<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:4dd1d6c4-fc3c-4731-a76a-2b9be8f836e3,g:5dee559b-8a02-46a8-ae13-48a845f31904-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.uei.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="ueic-20250331.xsd#CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_fb5d5ad3-b536-4dcc-9122-c7f0c938c36b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_61a944b7-2ca2-4212-ae2d-688cd0a3e084" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_fb5d5ad3-b536-4dcc-9122-c7f0c938c36b" xlink:to="loc_us-gaap_StatementTable_61a944b7-2ca2-4212-ae2d-688cd0a3e084" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_bea639c0-6bf1-422c-a7c6-5a1b20397d29" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_61a944b7-2ca2-4212-ae2d-688cd0a3e084" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_bea639c0-6bf1-422c-a7c6-5a1b20397d29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_bea639c0-6bf1-422c-a7c6-5a1b20397d29_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bea639c0-6bf1-422c-a7c6-5a1b20397d29" xlink:to="loc_us-gaap_EquityComponentDomain_bea639c0-6bf1-422c-a7c6-5a1b20397d29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_682fb6a2-11a0-4af1-8fff-7779e6cb6d21" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bea639c0-6bf1-422c-a7c6-5a1b20397d29" xlink:to="loc_us-gaap_EquityComponentDomain_682fb6a2-11a0-4af1-8fff-7779e6cb6d21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_6c0fe31b-9313-4d66-bb30-70aca33e8203" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_682fb6a2-11a0-4af1-8fff-7779e6cb6d21" xlink:to="loc_us-gaap_CommonStockMember_6c0fe31b-9313-4d66-bb30-70aca33e8203" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_44d4d6d5-d559-4e17-96f4-5e7222036411" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_682fb6a2-11a0-4af1-8fff-7779e6cb6d21" xlink:to="loc_us-gaap_TreasuryStockCommonMember_44d4d6d5-d559-4e17-96f4-5e7222036411" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_e64f8afc-0fad-4d1b-8036-e07a1f927416" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_682fb6a2-11a0-4af1-8fff-7779e6cb6d21" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_e64f8afc-0fad-4d1b-8036-e07a1f927416" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_8e849727-e165-4f87-8aa6-4d21049d4f7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_682fb6a2-11a0-4af1-8fff-7779e6cb6d21" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_8e849727-e165-4f87-8aa6-4d21049d4f7f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_bf706f5f-3a19-4121-918e-3eaafca70aef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_682fb6a2-11a0-4af1-8fff-7779e6cb6d21" xlink:to="loc_us-gaap_RetainedEarningsMember_bf706f5f-3a19-4121-918e-3eaafca70aef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_fb5d5ad3-b536-4dcc-9122-c7f0c938c36b" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_9a680c79-0af5-4dce-87d6-961adf897245" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_9a680c79-0af5-4dce-87d6-961adf897245" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9bfefdc1-c4d8-46d2-a754-4763c20c1f70" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9bfefdc1-c4d8-46d2-a754-4763c20c1f70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_ea63eb7c-64f0-4d2f-9da8-926916668c01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_TreasuryStockCommonShares_ea63eb7c-64f0-4d2f-9da8-926916668c01" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_9c09eeee-8708-4554-812b-93ca9517417a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_NetIncomeLoss_9c09eeee-8708-4554-812b-93ca9517417a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_f73050ce-9690-4fba-ad4c-30de74a75bd7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_f73050ce-9690-4fba-ad4c-30de74a75bd7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_fefa031b-33f6-49c7-ab18-27fd5cf42fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_fefa031b-33f6-49c7-ab18-27fd5cf42fe8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_b6d364ea-ce21-4456-a7e5-4a1d8154dfb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_b6d364ea-ce21-4456-a7e5-4a1d8154dfb2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_648213c3-5d81-435b-a347-7b09a16c8b0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_648213c3-5d81-435b-a347-7b09a16c8b0b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_d49ba13b-cb76-4e7e-9b06-bd1154e40dac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_d49ba13b-cb76-4e7e-9b06-bd1154e40dac" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_SharesIssuedToDirectorsShares_ca3eccff-9bf8-43fa-b9e9-08d64785b5c7" xlink:href="ueic-20250331.xsd#ueic_SharesIssuedToDirectorsShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_ueic_SharesIssuedToDirectorsShares_ca3eccff-9bf8-43fa-b9e9-08d64785b5c7" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_SharesIssuedToDirectorsValue_f04f079c-3a9d-4240-ac48-229d50776b54" xlink:href="ueic-20250331.xsd#ueic_SharesIssuedToDirectorsValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_ueic_SharesIssuedToDirectorsValue_f04f079c-3a9d-4240-ac48-229d50776b54" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_7f6cb290-9ed3-48e4-8834-91196e9599eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d4b0358d-0711-483a-b5ac-192a69d5419d" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_7f6cb290-9ed3-48e4-8834-91196e9599eb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_942a85ae-d633-403d-8b1e-074e8b73db29" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_c3dfa540-9e18-47bb-84f9-2c37a52298d8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_6eb26d91-ebe4-4b9f-b249-303ed1a4782b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockCommonShares"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/CashandCashEquivalentsSummaryofGeographicAreaDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#CashandCashEquivalentsSummaryofGeographicAreaDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/CashandCashEquivalentsSummaryofGeographicAreaDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsLineItems_2698a2c5-b750-45ff-80b2-15cf2a9a9c73" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_e8ef09fd-6f2e-4039-9223-f7396f3b2eda" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_2698a2c5-b750-45ff-80b2-15cf2a9a9c73" xlink:to="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_e8ef09fd-6f2e-4039-9223-f7396f3b2eda" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_6914eea0-ab39-4b4b-86ba-9a09e4e43393" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_e8ef09fd-6f2e-4039-9223-f7396f3b2eda" xlink:to="loc_srt_StatementGeographicalAxis_6914eea0-ab39-4b4b-86ba-9a09e4e43393" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_6914eea0-ab39-4b4b-86ba-9a09e4e43393_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_6914eea0-ab39-4b4b-86ba-9a09e4e43393" xlink:to="loc_srt_SegmentGeographicalDomain_6914eea0-ab39-4b4b-86ba-9a09e4e43393_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ac701c1d-2bff-411e-a9e2-237fe4362f8c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_6914eea0-ab39-4b4b-86ba-9a09e4e43393" xlink:to="loc_srt_SegmentGeographicalDomain_ac701c1d-2bff-411e-a9e2-237fe4362f8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NorthAmericaMember_8a4caccb-c7f1-4834-b35c-ce921041d10f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_NorthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ac701c1d-2bff-411e-a9e2-237fe4362f8c" xlink:to="loc_srt_NorthAmericaMember_8a4caccb-c7f1-4834-b35c-ce921041d10f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_717f4eb4-5d42-46a1-bcf7-c5ea26e3f7dc" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ac701c1d-2bff-411e-a9e2-237fe4362f8c" xlink:to="loc_country_CN_717f4eb4-5d42-46a1-bcf7-c5ea26e3f7dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AsiaExcludingPeoplesRepublicOfChinaMember_959f4e79-49bb-4dce-a2ce-82c7d0a72562" xlink:href="ueic-20250331.xsd#ueic_AsiaExcludingPeoplesRepublicOfChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ac701c1d-2bff-411e-a9e2-237fe4362f8c" xlink:to="loc_ueic_AsiaExcludingPeoplesRepublicOfChinaMember_959f4e79-49bb-4dce-a2ce-82c7d0a72562" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_7adfa999-84e8-4eb9-aade-c8a3bc10b5a8" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ac701c1d-2bff-411e-a9e2-237fe4362f8c" xlink:to="loc_srt_EuropeMember_7adfa999-84e8-4eb9-aade-c8a3bc10b5a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SouthAmericaMember_579b8c38-9195-4a76-896a-b357ecb122f9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SouthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ac701c1d-2bff-411e-a9e2-237fe4362f8c" xlink:to="loc_srt_SouthAmericaMember_579b8c38-9195-4a76-896a-b357ecb122f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9a95db70-28ea-4e54-8781-162b5371f415" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_2698a2c5-b750-45ff-80b2-15cf2a9a9c73" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_9a95db70-28ea-4e54-8781-162b5371f415" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/RevenueandAccountsReceivableNetScheduleofRevenueRecognitionDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#RevenueandAccountsReceivableNetScheduleofRevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/RevenueandAccountsReceivableNetScheduleofRevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_c1211398-785d-4df8-bca9-63dde9a4b175" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_57cf62f5-2591-4393-83ad-c48323a74d55" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_c1211398-785d-4df8-bca9-63dde9a4b175" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_57cf62f5-2591-4393-83ad-c48323a74d55" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_063ec0d7-9f28-408a-8326-0efd0a518877" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_57cf62f5-2591-4393-83ad-c48323a74d55" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_063ec0d7-9f28-408a-8326-0efd0a518877" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_063ec0d7-9f28-408a-8326-0efd0a518877_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_063ec0d7-9f28-408a-8326-0efd0a518877" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_063ec0d7-9f28-408a-8326-0efd0a518877_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_4191ab72-63fe-478d-b85a-53ede2f766eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_063ec0d7-9f28-408a-8326-0efd0a518877" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_4191ab72-63fe-478d-b85a-53ede2f766eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_b1235e3b-006e-46bf-a02a-2363f10719db" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransferredAtPointInTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_4191ab72-63fe-478d-b85a-53ede2f766eb" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_b1235e3b-006e-46bf-a02a-2363f10719db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_f895ba08-0c66-4dd0-81b9-53c8cfe0ca7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_4191ab72-63fe-478d-b85a-53ede2f766eb" xlink:to="loc_us-gaap_TransferredOverTimeMember_f895ba08-0c66-4dd0-81b9-53c8cfe0ca7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_3308a256-f94c-491c-a123-065cfc995f2a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_57cf62f5-2591-4393-83ad-c48323a74d55" xlink:to="loc_srt_ProductOrServiceAxis_3308a256-f94c-491c-a123-065cfc995f2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3308a256-f94c-491c-a123-065cfc995f2a_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_3308a256-f94c-491c-a123-065cfc995f2a" xlink:to="loc_srt_ProductsAndServicesDomain_3308a256-f94c-491c-a123-065cfc995f2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_da52f2f5-9384-40d7-8f12-5576a673ab8b" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_3308a256-f94c-491c-a123-065cfc995f2a" xlink:to="loc_srt_ProductsAndServicesDomain_da52f2f5-9384-40d7-8f12-5576a673ab8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ConnectedHomeMember_4f91a2dc-9959-4ac1-8bca-a4070b924025" xlink:href="ueic-20250331.xsd#ueic_ConnectedHomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_da52f2f5-9384-40d7-8f12-5576a673ab8b" xlink:to="loc_ueic_ConnectedHomeMember_4f91a2dc-9959-4ac1-8bca-a4070b924025" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_HomeEntertainmentMember_53ec3f31-2b2c-420b-8d21-d9ae6120e6e6" xlink:href="ueic-20250331.xsd#ueic_HomeEntertainmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_da52f2f5-9384-40d7-8f12-5576a673ab8b" xlink:to="loc_ueic_HomeEntertainmentMember_53ec3f31-2b2c-420b-8d21-d9ae6120e6e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_bad9e2ea-12f7-4d8b-8a41-3c239df4cd13" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_c1211398-785d-4df8-bca9-63dde9a4b175" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_bad9e2ea-12f7-4d8b-8a41-3c239df4cd13" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/RevenueandAccountsReceivableNetRevenuefromExternalCustomersbyGeographicAreasDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#RevenueandAccountsReceivableNetRevenuefromExternalCustomersbyGeographicAreasDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/RevenueandAccountsReceivableNetRevenuefromExternalCustomersbyGeographicAreasDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_bad4ae2b-98d4-4550-94aa-e6814198dd41" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_1558347c-df1f-4f6c-8521-2699a21914f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bad4ae2b-98d4-4550-94aa-e6814198dd41" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_1558347c-df1f-4f6c-8521-2699a21914f0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_789ae466-1bd1-4ea1-87b9-d51722494bd7" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_1558347c-df1f-4f6c-8521-2699a21914f0" xlink:to="loc_srt_StatementGeographicalAxis_789ae466-1bd1-4ea1-87b9-d51722494bd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_789ae466-1bd1-4ea1-87b9-d51722494bd7_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_789ae466-1bd1-4ea1-87b9-d51722494bd7" xlink:to="loc_srt_SegmentGeographicalDomain_789ae466-1bd1-4ea1-87b9-d51722494bd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_789ae466-1bd1-4ea1-87b9-d51722494bd7" xlink:to="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_65a5bba4-c052-463e-842f-e23444408f3c" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:to="loc_country_US_65a5bba4-c052-463e-842f-e23444408f3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AsiaExcludingPeoplesRepublicOfChinaMember_f9324a18-6659-4c5e-ae52-22622263ede2" xlink:href="ueic-20250331.xsd#ueic_AsiaExcludingPeoplesRepublicOfChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:to="loc_ueic_AsiaExcludingPeoplesRepublicOfChinaMember_f9324a18-6659-4c5e-ae52-22622263ede2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_e8c2a6fc-0ef7-4ff7-a971-19f7d772ce79" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:to="loc_srt_EuropeMember_e8c2a6fc-0ef7-4ff7-a971-19f7d772ce79" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LatinAmericaMember_7d0a3add-7a5c-4cf3-bd93-daab9832913a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_LatinAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:to="loc_srt_LatinAmericaMember_7d0a3add-7a5c-4cf3-bd93-daab9832913a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_3ed330b9-b313-4581-95e7-76818f1d4b93" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:to="loc_country_CN_3ed330b9-b313-4581-95e7-76818f1d4b93" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AllOtherCountriesMember_c08d20ff-8330-41e1-80ea-c3c1b674f008" xlink:href="ueic-20250331.xsd#ueic_AllOtherCountriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_4389d2e1-2c4d-47fd-841e-1e513ac95194" xlink:to="loc_ueic_AllOtherCountriesMember_c08d20ff-8330-41e1-80ea-c3c1b674f008" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_585a9ac8-a9cd-486b-acf5-bc8298f916d7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bad4ae2b-98d4-4550-94aa-e6814198dd41" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_585a9ac8-a9cd-486b-acf5-bc8298f916d7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/RevenueandAccountsReceivableNetNetSalestoSignificantCustomersDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#RevenueandAccountsReceivableNetNetSalestoSignificantCustomersDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/RevenueandAccountsReceivableNetNetSalestoSignificantCustomersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_37609cee-76a8-48e8-bef9-30c2caae80eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_91adc65a-0d10-4e0c-98cd-ccb29dbaea97" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_37609cee-76a8-48e8-bef9-30c2caae80eb" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_91adc65a-0d10-4e0c-98cd-ccb29dbaea97" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_b9dc10ff-26ae-4b52-8dfe-d02282840c3b" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_91adc65a-0d10-4e0c-98cd-ccb29dbaea97" xlink:to="loc_srt_MajorCustomersAxis_b9dc10ff-26ae-4b52-8dfe-d02282840c3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_b9dc10ff-26ae-4b52-8dfe-d02282840c3b_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_b9dc10ff-26ae-4b52-8dfe-d02282840c3b" xlink:to="loc_srt_NameOfMajorCustomerDomain_b9dc10ff-26ae-4b52-8dfe-d02282840c3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_76c7e73e-7b0a-4dc2-a0b1-bc3f2b80c7cc" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_b9dc10ff-26ae-4b52-8dfe-d02282840c3b" xlink:to="loc_srt_NameOfMajorCustomerDomain_76c7e73e-7b0a-4dc2-a0b1-bc3f2b80c7cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_DaikinIndustriesLtd.Member_463afaaf-4d85-4f5f-b0ce-77859b2e72b9" xlink:href="ueic-20250331.xsd#ueic_DaikinIndustriesLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_76c7e73e-7b0a-4dc2-a0b1-bc3f2b80c7cc" xlink:to="loc_ueic_DaikinIndustriesLtd.Member_463afaaf-4d85-4f5f-b0ce-77859b2e72b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ComcastCommunicationsMember_5575468a-a248-4491-9eff-632237e54baf" xlink:href="ueic-20250331.xsd#ueic_ComcastCommunicationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_76c7e73e-7b0a-4dc2-a0b1-bc3f2b80c7cc" xlink:to="loc_ueic_ComcastCommunicationsMember_5575468a-a248-4491-9eff-632237e54baf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_CharterCommunicationsMember_e65ad176-b521-46b7-9cad-5c6d4ac1ffce" xlink:href="ueic-20250331.xsd#ueic_CharterCommunicationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_76c7e73e-7b0a-4dc2-a0b1-bc3f2b80c7cc" xlink:to="loc_ueic_CharterCommunicationsMember_e65ad176-b521-46b7-9cad-5c6d4ac1ffce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_1c6da7d3-e248-4466-9452-ace5ad29b348" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_91adc65a-0d10-4e0c-98cd-ccb29dbaea97" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_1c6da7d3-e248-4466-9452-ace5ad29b348" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_1c6da7d3-e248-4466-9452-ace5ad29b348_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_1c6da7d3-e248-4466-9452-ace5ad29b348" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_1c6da7d3-e248-4466-9452-ace5ad29b348_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_8e8b2957-a4e9-467f-99a8-efe85f40dc0a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_1c6da7d3-e248-4466-9452-ace5ad29b348" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_8e8b2957-a4e9-467f-99a8-efe85f40dc0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_cceee5ab-30f8-4ba4-801e-b162c826f519" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_8e8b2957-a4e9-467f-99a8-efe85f40dc0a" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_cceee5ab-30f8-4ba4-801e-b162c826f519" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_493c5bd6-79eb-4966-8c85-018b27f3d3e9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_91adc65a-0d10-4e0c-98cd-ccb29dbaea97" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_493c5bd6-79eb-4966-8c85-018b27f3d3e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_493c5bd6-79eb-4966-8c85-018b27f3d3e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_493c5bd6-79eb-4966-8c85-018b27f3d3e9" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_493c5bd6-79eb-4966-8c85-018b27f3d3e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_32db0a17-23f7-4784-8a25-8c8de6e72742" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_493c5bd6-79eb-4966-8c85-018b27f3d3e9" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_32db0a17-23f7-4784-8a25-8c8de6e72742" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_c3a71af4-1d84-4eb4-aaee-89b2af8fca31" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_32db0a17-23f7-4784-8a25-8c8de6e72742" xlink:to="loc_us-gaap_SalesRevenueNetMember_c3a71af4-1d84-4eb4-aaee-89b2af8fca31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_79a1bb96-4863-46b7-9d0b-279954974f83" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_37609cee-76a8-48e8-bef9-30c2caae80eb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_79a1bb96-4863-46b7-9d0b-279954974f83" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_efc4e2c8-a638-44a6-bf0c-eeb8c9e34b16" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_37609cee-76a8-48e8-bef9-30c2caae80eb" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_efc4e2c8-a638-44a6-bf0c-eeb8c9e34b16" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/InventoriesPurchasesfromSignificantSuppliersDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#InventoriesPurchasesfromSignificantSuppliersDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/InventoriesPurchasesfromSignificantSuppliersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_c8d7e696-7653-4f66-bcec-fbebae3f9a9f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_df46f902-73f8-4882-8301-b7fa033563c1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_c8d7e696-7653-4f66-bcec-fbebae3f9a9f" xlink:to="loc_us-gaap_ConcentrationRiskTable_df46f902-73f8-4882-8301-b7fa033563c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_b0f2cf01-725d-45d6-bdee-9e4142504858" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_df46f902-73f8-4882-8301-b7fa033563c1" xlink:to="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_b0f2cf01-725d-45d6-bdee-9e4142504858" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_b0f2cf01-725d-45d6-bdee-9e4142504858_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_b0f2cf01-725d-45d6-bdee-9e4142504858" xlink:to="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_b0f2cf01-725d-45d6-bdee-9e4142504858_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_946e93c0-8fb2-49e5-8b05-a7478cb62d38" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_b0f2cf01-725d-45d6-bdee-9e4142504858" xlink:to="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_946e93c0-8fb2-49e5-8b05-a7478cb62d38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_QorvoInternationalPteLtdMember_61e68bc6-31f6-4c40-914f-00c25f964771" xlink:href="ueic-20250331.xsd#ueic_QorvoInternationalPteLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_946e93c0-8fb2-49e5-8b05-a7478cb62d38" xlink:to="loc_ueic_QorvoInternationalPteLtdMember_61e68bc6-31f6-4c40-914f-00c25f964771" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_49f24da0-bba8-48eb-88fc-12c22e01f48a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_df46f902-73f8-4882-8301-b7fa033563c1" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_49f24da0-bba8-48eb-88fc-12c22e01f48a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_49f24da0-bba8-48eb-88fc-12c22e01f48a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_49f24da0-bba8-48eb-88fc-12c22e01f48a" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_49f24da0-bba8-48eb-88fc-12c22e01f48a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_5309b628-27a9-4a4e-b2eb-e468c686ed6f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_49f24da0-bba8-48eb-88fc-12c22e01f48a" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_5309b628-27a9-4a4e-b2eb-e468c686ed6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplierConcentrationRiskMember_4b2b05c4-aba8-48f2-867c-d40fa7d87000" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SupplierConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_5309b628-27a9-4a4e-b2eb-e468c686ed6f" xlink:to="loc_us-gaap_SupplierConcentrationRiskMember_4b2b05c4-aba8-48f2-867c-d40fa7d87000" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_3e5798ad-281a-429f-a7b4-db1f7fe0afcb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_df46f902-73f8-4882-8301-b7fa033563c1" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_3e5798ad-281a-429f-a7b4-db1f7fe0afcb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_3e5798ad-281a-429f-a7b4-db1f7fe0afcb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_3e5798ad-281a-429f-a7b4-db1f7fe0afcb" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_3e5798ad-281a-429f-a7b4-db1f7fe0afcb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_41314ec1-79a3-4ba1-99f0-0ff1ba5134d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_3e5798ad-281a-429f-a7b4-db1f7fe0afcb" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_41314ec1-79a3-4ba1-99f0-0ff1ba5134d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsTotalMember_c9113733-9e28-4762-9dc2-6336521bc794" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsTotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_41314ec1-79a3-4ba1-99f0-0ff1ba5134d2" xlink:to="loc_us-gaap_CostOfGoodsTotalMember_c9113733-9e28-4762-9dc2-6336521bc794" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_InventoryPurchases_d92044eb-7cc2-4232-9320-b93ac32b485b" xlink:href="ueic-20250331.xsd#ueic_InventoryPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_c8d7e696-7653-4f66-bcec-fbebae3f9a9f" xlink:to="loc_ueic_InventoryPurchases_d92044eb-7cc2-4232-9320-b93ac32b485b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_3f7b4882-3a5b-4ac1-b5b0-6bf2b7714cdb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_c8d7e696-7653-4f66-bcec-fbebae3f9a9f" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_3f7b4882-3a5b-4ac1-b5b0-6bf2b7714cdb" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/LonglivedTangibleAssetsLonglivedTangibleAssetsbyGeographicAreaDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#LonglivedTangibleAssetsLonglivedTangibleAssetsbyGeographicAreaDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/LonglivedTangibleAssetsLonglivedTangibleAssetsbyGeographicAreaDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_c32036b0-49e3-487d-86be-f33c1bb06a12" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_2449f01a-6849-49d8-8e28-025645a09f23" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_c32036b0-49e3-487d-86be-f33c1bb06a12" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_2449f01a-6849-49d8-8e28-025645a09f23" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_b3c7d950-6700-42b9-a74b-9a55d2daf45a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_2449f01a-6849-49d8-8e28-025645a09f23" xlink:to="loc_srt_StatementGeographicalAxis_b3c7d950-6700-42b9-a74b-9a55d2daf45a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_b3c7d950-6700-42b9-a74b-9a55d2daf45a_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_b3c7d950-6700-42b9-a74b-9a55d2daf45a" xlink:to="loc_srt_SegmentGeographicalDomain_b3c7d950-6700-42b9-a74b-9a55d2daf45a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_546660f6-b75c-4c75-b7d3-6eafce6ae4c4" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_b3c7d950-6700-42b9-a74b-9a55d2daf45a" xlink:to="loc_srt_SegmentGeographicalDomain_546660f6-b75c-4c75-b7d3-6eafce6ae4c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_8ed1ef4c-59ad-4b48-8ee8-7a6790bbfba8" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_546660f6-b75c-4c75-b7d3-6eafce6ae4c4" xlink:to="loc_country_US_8ed1ef4c-59ad-4b48-8ee8-7a6790bbfba8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_1fa86ae0-c48f-46bf-8874-28438f30e94c" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_546660f6-b75c-4c75-b7d3-6eafce6ae4c4" xlink:to="loc_country_CN_1fa86ae0-c48f-46bf-8874-28438f30e94c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_VN_0ce06ae1-18aa-40d6-8071-f2d183ff7d86" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_VN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_546660f6-b75c-4c75-b7d3-6eafce6ae4c4" xlink:to="loc_country_VN_0ce06ae1-18aa-40d6-8071-f2d183ff7d86" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MX_d3e57d16-bfa6-4586-8c71-df8abc29c328" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_MX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_546660f6-b75c-4c75-b7d3-6eafce6ae4c4" xlink:to="loc_country_MX_d3e57d16-bfa6-4586-8c71-df8abc29c328" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AllOtherCountriesMember_1d684b6e-b60b-4c6b-962e-9a65576f5701" xlink:href="ueic-20250331.xsd#ueic_AllOtherCountriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_546660f6-b75c-4c75-b7d3-6eafce6ae4c4" xlink:to="loc_ueic_AllOtherCountriesMember_1d684b6e-b60b-4c6b-962e-9a65576f5701" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_d46730ba-24cb-4431-b2d9-2f0791e02acf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_c32036b0-49e3-487d-86be-f33c1bb06a12" xlink:to="loc_us-gaap_NoncurrentAssets_d46730ba-24cb-4431-b2d9-2f0791e02acf" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/IntangibleAssetsNetAmortizationExpensebyIncomeStatementCaptionDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#IntangibleAssetsNetAmortizationExpensebyIncomeStatementCaptionDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/IntangibleAssetsNetAmortizationExpensebyIncomeStatementCaptionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c2f0ffcc-5dc8-4878-80c8-5617f7f13c31" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e18ea363-433d-4fd9-9864-a2d509d2e88d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c2f0ffcc-5dc8-4878-80c8-5617f7f13c31" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e18ea363-433d-4fd9-9864-a2d509d2e88d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1f94e499-7dbf-43e4-b390-facc5e198bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e18ea363-433d-4fd9-9864-a2d509d2e88d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1f94e499-7dbf-43e4-b390-facc5e198bf7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f94e499-7dbf-43e4-b390-facc5e198bf7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1f94e499-7dbf-43e4-b390-facc5e198bf7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1f94e499-7dbf-43e4-b390-facc5e198bf7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da937195-2adc-4466-9b63-93c1a425a7c4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1f94e499-7dbf-43e4-b390-facc5e198bf7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da937195-2adc-4466-9b63-93c1a425a7c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_b30f3b44-1537-477a-b1b6-dbdc72628137" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da937195-2adc-4466-9b63-93c1a425a7c4" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_b30f3b44-1537-477a-b1b6-dbdc72628137" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_151ed2b3-9b33-4b60-a726-b4f21a0dee0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da937195-2adc-4466-9b63-93c1a425a7c4" xlink:to="loc_us-gaap_CustomerRelationshipsMember_151ed2b3-9b33-4b60-a726-b4f21a0dee0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_5cf99197-4cf7-4d96-8a63-2de297224453" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da937195-2adc-4466-9b63-93c1a425a7c4" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_5cf99197-4cf7-4d96-8a63-2de297224453" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PatentsMember_338af9ca-e7e5-46fd-a21f-91a32bdd91be" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PatentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da937195-2adc-4466-9b63-93c1a425a7c4" xlink:to="loc_us-gaap_PatentsMember_338af9ca-e7e5-46fd-a21f-91a32bdd91be" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_cc407677-627f-41f2-a4e9-e92a4f48f893" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_da937195-2adc-4466-9b63-93c1a425a7c4" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_cc407677-627f-41f2-a4e9-e92a4f48f893" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_9343fc9d-2ea1-4481-892c-cc7bf4abc860" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c2f0ffcc-5dc8-4878-80c8-5617f7f13c31" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_9343fc9d-2ea1-4481-892c-cc7bf4abc860" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_6d15b579-43db-4b2b-b9fa-456067a141e7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_9343fc9d-2ea1-4481-892c-cc7bf4abc860" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_6d15b579-43db-4b2b-b9fa-456067a141e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_700f727c-df1e-44fc-a17f-f51c22560997" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_9343fc9d-2ea1-4481-892c-cc7bf4abc860" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_700f727c-df1e-44fc-a17f-f51c22560997" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_8f21e119-3d7e-470c-8b68-6e03370ee223" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_9343fc9d-2ea1-4481-892c-cc7bf4abc860" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_8f21e119-3d7e-470c-8b68-6e03370ee223" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_FiniteLivedIntangibleAssetsFullyAmortizedGross_78343fd8-a85c-4ed8-8376-6335a5e27f41" xlink:href="ueic-20250331.xsd#ueic_FiniteLivedIntangibleAssetsFullyAmortizedGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c2f0ffcc-5dc8-4878-80c8-5617f7f13c31" xlink:to="loc_ueic_FiniteLivedIntangibleAssetsFullyAmortizedGross_78343fd8-a85c-4ed8-8376-6335a5e27f41" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/IntangibleAssetsNetAmortizationExpensebyIncomeStatementCaptionDetails_1" xlink:type="simple" xlink:href="ueic-20250331.xsd#IntangibleAssetsNetAmortizationExpensebyIncomeStatementCaptionDetails_1"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/IntangibleAssetsNetAmortizationExpensebyIncomeStatementCaptionDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_cb10eee0-f6a2-4452-8153-01fb93867714" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ebdf09a4-ab01-42ff-9801-b37b2e4db116" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_cb10eee0-f6a2-4452-8153-01fb93867714" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ebdf09a4-ab01-42ff-9801-b37b2e4db116" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_af31246c-f0d7-4f12-9964-7fb90c0559c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_ebdf09a4-ab01-42ff-9801-b37b2e4db116" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_af31246c-f0d7-4f12-9964-7fb90c0559c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_af31246c-f0d7-4f12-9964-7fb90c0559c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_af31246c-f0d7-4f12-9964-7fb90c0559c0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_af31246c-f0d7-4f12-9964-7fb90c0559c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e01eb99f-b5e8-4c15-8d1a-2190d59ee9c8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_af31246c-f0d7-4f12-9964-7fb90c0559c0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e01eb99f-b5e8-4c15-8d1a-2190d59ee9c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_1bb0c3c6-2fb3-4b45-bfe9-68fd61e3e047" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_e01eb99f-b5e8-4c15-8d1a-2190d59ee9c8" xlink:to="loc_us-gaap_CostOfSalesMember_1bb0c3c6-2fb3-4b45-bfe9-68fd61e3e047" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_1ca2034c-02b3-4bda-9d44-ff9eda4697a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_e01eb99f-b5e8-4c15-8d1a-2190d59ee9c8" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_1ca2034c-02b3-4bda-9d44-ff9eda4697a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_b1ee8c53-927d-4e52-bfb0-be846a164266" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_cb10eee0-f6a2-4452-8153-01fb93867714" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_b1ee8c53-927d-4e52-bfb0-be846a164266" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_46b49f4d-7b61-4b6e-8e8b-ff842407bdbc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_b6f0a8a2-9e7f-4469-87fb-465977c7a3c9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_46b49f4d-7b61-4b6e-8e8b-ff842407bdbc" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_b6f0a8a2-9e7f-4469-87fb-465977c7a3c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_08cc8f28-d69b-4f62-bcf2-5ab1879c70f0" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_b6f0a8a2-9e7f-4469-87fb-465977c7a3c9" xlink:to="loc_srt_RangeAxis_08cc8f28-d69b-4f62-bcf2-5ab1879c70f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_08cc8f28-d69b-4f62-bcf2-5ab1879c70f0_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_08cc8f28-d69b-4f62-bcf2-5ab1879c70f0" xlink:to="loc_srt_RangeMember_08cc8f28-d69b-4f62-bcf2-5ab1879c70f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_391c1634-c0b2-4930-918a-6b0da1b9eb80" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_08cc8f28-d69b-4f62-bcf2-5ab1879c70f0" xlink:to="loc_srt_RangeMember_391c1634-c0b2-4930-918a-6b0da1b9eb80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_2839069f-a265-4d53-8667-d3619ac1cd95" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_391c1634-c0b2-4930-918a-6b0da1b9eb80" xlink:to="loc_srt_MaximumMember_2839069f-a265-4d53-8667-d3619ac1cd95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_797bf6a2-fe99-4a27-9fb8-6a22dd65a0c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_46b49f4d-7b61-4b6e-8e8b-ff842407bdbc" xlink:to="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_797bf6a2-fe99-4a27-9fb8-6a22dd65a0c3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/LeasesOperatingLeaseExpenseOperatingLeaseCashFlowsandSupplementalCashFlowInformationDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#LeasesOperatingLeaseExpenseOperatingLeaseCashFlowsandSupplementalCashFlowInformationDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/LeasesOperatingLeaseExpenseOperatingLeaseCashFlowsandSupplementalCashFlowInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_35352b2d-6951-4160-be06-9b4b92247366" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_a0cc0772-bf84-419a-8cc5-7b6b4f5c3b1e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_35352b2d-6951-4160-be06-9b4b92247366" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_a0cc0772-bf84-419a-8cc5-7b6b4f5c3b1e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_1d62100e-ada9-4f96-bf82-d5bddc3968fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_a0cc0772-bf84-419a-8cc5-7b6b4f5c3b1e" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_1d62100e-ada9-4f96-bf82-d5bddc3968fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_1d62100e-ada9-4f96-bf82-d5bddc3968fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_1d62100e-ada9-4f96-bf82-d5bddc3968fb" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_1d62100e-ada9-4f96-bf82-d5bddc3968fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_a6c2561f-0342-4331-a47f-9da46ce81c07" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_1d62100e-ada9-4f96-bf82-d5bddc3968fb" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_a6c2561f-0342-4331-a47f-9da46ce81c07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_e3321dd8-243f-4e91-a0e7-a5b6ba2e26fa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_a6c2561f-0342-4331-a47f-9da46ce81c07" xlink:to="loc_us-gaap_CostOfSalesMember_e3321dd8-243f-4e91-a0e7-a5b6ba2e26fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_06e9f82c-319d-4d97-b697-0c48783e0782" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_a6c2561f-0342-4331-a47f-9da46ce81c07" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_06e9f82c-319d-4d97-b697-0c48783e0782" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_8a27ba39-262c-47ba-abb5-29ce130590de" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_35352b2d-6951-4160-be06-9b4b92247366" xlink:to="loc_us-gaap_OperatingLeaseCost_8a27ba39-262c-47ba-abb5-29ce130590de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_OperatingLeasesVariableAndShortTermLeaseCosts_d3f4f5b0-110f-4b7a-9c87-c349125e2295" xlink:href="ueic-20250331.xsd#ueic_OperatingLeasesVariableAndShortTermLeaseCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_35352b2d-6951-4160-be06-9b4b92247366" xlink:to="loc_ueic_OperatingLeasesVariableAndShortTermLeaseCosts_d3f4f5b0-110f-4b7a-9c87-c349125e2295" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_6d03e004-0fa1-4888-8ccf-22a7459cafc3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_35352b2d-6951-4160-be06-9b4b92247366" xlink:to="loc_us-gaap_OperatingLeasePayments_6d03e004-0fa1-4888-8ccf-22a7459cafc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_720ef627-9828-423d-93c9-23ef17ef1328" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_35352b2d-6951-4160-be06-9b4b92247366" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_720ef627-9828-423d-93c9-23ef17ef1328" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/LinesofCreditDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#LinesofCreditDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/LinesofCreditDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_ee7851ef-e744-4e06-aeb9-8fd6c28ec483" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_ee7851ef-e744-4e06-aeb9-8fd6c28ec483" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_d6fa6739-4eb3-4e90-9afb-bfe7e6b56d80" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_ee7851ef-e744-4e06-aeb9-8fd6c28ec483" xlink:to="loc_us-gaap_CreditFacilityAxis_d6fa6739-4eb3-4e90-9afb-bfe7e6b56d80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d6fa6739-4eb3-4e90-9afb-bfe7e6b56d80_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_d6fa6739-4eb3-4e90-9afb-bfe7e6b56d80" xlink:to="loc_us-gaap_CreditFacilityDomain_d6fa6739-4eb3-4e90-9afb-bfe7e6b56d80_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_a4e430e9-d937-4c42-8f45-3f8c007deded" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_d6fa6739-4eb3-4e90-9afb-bfe7e6b56d80" xlink:to="loc_us-gaap_CreditFacilityDomain_a4e430e9-d937-4c42-8f45-3f8c007deded" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_48c004ca-d4ac-4392-94b5-1b6560fe3d28" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a4e430e9-d937-4c42-8f45-3f8c007deded" xlink:to="loc_us-gaap_LineOfCreditMember_48c004ca-d4ac-4392-94b5-1b6560fe3d28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_dd171858-b75e-4caa-9de5-8792ef8beddc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_a4e430e9-d937-4c42-8f45-3f8c007deded" xlink:to="loc_us-gaap_LetterOfCreditMember_dd171858-b75e-4caa-9de5-8792ef8beddc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_310c8061-f940-4678-b5ce-dac9fa88d963" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_ee7851ef-e744-4e06-aeb9-8fd6c28ec483" xlink:to="loc_us-gaap_DebtInstrumentAxis_310c8061-f940-4678-b5ce-dac9fa88d963" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_310c8061-f940-4678-b5ce-dac9fa88d963_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_310c8061-f940-4678-b5ce-dac9fa88d963" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_310c8061-f940-4678-b5ce-dac9fa88d963_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_e0b01968-875c-4c63-bb76-6f401d72347c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_310c8061-f940-4678-b5ce-dac9fa88d963" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_e0b01968-875c-4c63-bb76-6f401d72347c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_SecondAmendedCreditAgreementMember_7c818453-2bd2-40c6-a04c-84fe8ed622f3" xlink:href="ueic-20250331.xsd#ueic_SecondAmendedCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_e0b01968-875c-4c63-bb76-6f401d72347c" xlink:to="loc_ueic_SecondAmendedCreditAgreementMember_7c818453-2bd2-40c6-a04c-84fe8ed622f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_U.S.LineOfCreditMember_37578cae-3d0f-44da-8a05-d6d634d6d230" xlink:href="ueic-20250331.xsd#ueic_U.S.LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_e0b01968-875c-4c63-bb76-6f401d72347c" xlink:to="loc_ueic_U.S.LineOfCreditMember_37578cae-3d0f-44da-8a05-d6d634d6d230" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ChinaLineOfCreditMember_17d84989-21f7-4a0e-8ed3-def04ce33f8e" xlink:href="ueic-20250331.xsd#ueic_ChinaLineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_e0b01968-875c-4c63-bb76-6f401d72347c" xlink:to="loc_ueic_ChinaLineOfCreditMember_17d84989-21f7-4a0e-8ed3-def04ce33f8e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_e2ae4235-d6c7-41ad-a377-2a6cb0186668" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_ee7851ef-e744-4e06-aeb9-8fd6c28ec483" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_e2ae4235-d6c7-41ad-a377-2a6cb0186668" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_e2ae4235-d6c7-41ad-a377-2a6cb0186668_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_e2ae4235-d6c7-41ad-a377-2a6cb0186668" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_e2ae4235-d6c7-41ad-a377-2a6cb0186668_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_2fbc488f-7685-4368-a431-3896c6f82266" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLenderDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_e2ae4235-d6c7-41ad-a377-2a6cb0186668" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_2fbc488f-7685-4368-a431-3896c6f82266" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_UsBankMember_4bea9139-34a5-4437-a349-74a03b7deff7" xlink:href="ueic-20250331.xsd#ueic_UsBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_2fbc488f-7685-4368-a431-3896c6f82266" xlink:to="loc_ueic_UsBankMember_4bea9139-34a5-4437-a349-74a03b7deff7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_NationalInterbankMember_c68e90be-d724-4ffa-b6c6-65d7e79ccd32" xlink:href="ueic-20250331.xsd#ueic_NationalInterbankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_2fbc488f-7685-4368-a431-3896c6f82266" xlink:to="loc_ueic_NationalInterbankMember_c68e90be-d724-4ffa-b6c6-65d7e79ccd32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_dc4ac33e-b2e5-425e-8f34-e49959be666c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_ee7851ef-e744-4e06-aeb9-8fd6c28ec483" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_dc4ac33e-b2e5-425e-8f34-e49959be666c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_dc4ac33e-b2e5-425e-8f34-e49959be666c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_dc4ac33e-b2e5-425e-8f34-e49959be666c" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_dc4ac33e-b2e5-425e-8f34-e49959be666c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_acec8809-6e76-4d71-8a5e-3fb04e41826f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_dc4ac33e-b2e5-425e-8f34-e49959be666c" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_acec8809-6e76-4d71-8a5e-3fb04e41826f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_25003fdc-2f62-4390-8535-454a9807fc37" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_acec8809-6e76-4d71-8a5e-3fb04e41826f" xlink:to="loc_us-gaap_SubsequentEventMember_25003fdc-2f62-4390-8535-454a9807fc37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c0f20a43-9759-41e4-a8f8-a3281dcdd73b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_c0f20a43-9759-41e4-a8f8-a3281dcdd73b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8e35ea22-6831-4419-bf72-d6b1f0ca23ba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_8e35ea22-6831-4419-bf72-d6b1f0ca23ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_263c17e4-7bdf-4aa7-b457-e1e38775908d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_263c17e4-7bdf-4aa7-b457-e1e38775908d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0a57ee0c-8d47-4c04-a8bf-00c318bf00d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0a57ee0c-8d47-4c04-a8bf-00c318bf00d2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_ebbeb594-bfe9-4e35-9bc5-70abcbd5706d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0a57ee0c-8d47-4c04-a8bf-00c318bf00d2" xlink:to="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_ebbeb594-bfe9-4e35-9bc5-70abcbd5706d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_f2013c2a-56dc-4c58-922a-b17cd2442abf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_f2013c2a-56dc-4c58-922a-b17cd2442abf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_20d014e8-38f7-43d7-a6a3-a7f8e600fde3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_20d014e8-38f7-43d7-a6a3-a7f8e600fde3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditCurrent_c516b586-9d4c-4250-a6f7-b0d93981522e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LinesOfCreditCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_LinesOfCreditCurrent_c516b586-9d4c-4250-a6f7-b0d93981522e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseShortTermBorrowings_38bc365c-ecae-4be7-8e6a-6536abbde7ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_InterestExpenseShortTermBorrowings_38bc365c-ecae-4be7-8e6a-6536abbde7ab" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_DebtInstrumentFacilityFeeExpense_7b34ea47-dfe8-4daa-a9f2-e5f670ff2562" xlink:href="ueic-20250331.xsd#ueic_DebtInstrumentFacilityFeeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_ueic_DebtInstrumentFacilityFeeExpense_7b34ea47-dfe8-4daa-a9f2-e5f670ff2562" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_32951adc-867e-497f-89b2-b88fd62916f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_b861bf75-473f-4ed7-9f8e-31bed44d2fa1" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_32951adc-867e-497f-89b2-b88fd62916f9" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/AccruedCompensationScheduleofAccruedCompensationDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#AccruedCompensationScheduleofAccruedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/AccruedCompensationScheduleofAccruedCompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:href="ueic-20250331.xsd#ueic_AccruedLiabilitiesCurrentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AccruedLiabilitiesCurrentTable_400502f3-b5ae-4df6-bc83-071695508b0a" xlink:href="ueic-20250331.xsd#ueic_AccruedLiabilitiesCurrentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_ueic_AccruedLiabilitiesCurrentTable_400502f3-b5ae-4df6-bc83-071695508b0a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_ed603799-a2bb-42a8-870d-3f335156437e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ueic_AccruedLiabilitiesCurrentTable_400502f3-b5ae-4df6-bc83-071695508b0a" xlink:to="loc_srt_StatementGeographicalAxis_ed603799-a2bb-42a8-870d-3f335156437e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ed603799-a2bb-42a8-870d-3f335156437e_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_ed603799-a2bb-42a8-870d-3f335156437e" xlink:to="loc_srt_SegmentGeographicalDomain_ed603799-a2bb-42a8-870d-3f335156437e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_8b10838e-f61f-472c-ae6a-07ada53e07c6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_ed603799-a2bb-42a8-870d-3f335156437e" xlink:to="loc_srt_SegmentGeographicalDomain_8b10838e-f61f-472c-ae6a-07ada53e07c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MX_19d569d3-0148-4380-be73-c628e6e9b107" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_MX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_8b10838e-f61f-472c-ae6a-07ada53e07c6" xlink:to="loc_country_MX_19d569d3-0148-4380-be73-c628e6e9b107" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AsiaMember_8b8912f6-d7fc-488b-94f2-ca5057bdecff" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_AsiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_8b10838e-f61f-472c-ae6a-07ada53e07c6" xlink:to="loc_srt_AsiaMember_8b8912f6-d7fc-488b-94f2-ca5057bdecff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedBonusesCurrent_7a1f3b72-56b5-4953-9448-023dbf70669d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedBonusesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_us-gaap_AccruedBonusesCurrent_7a1f3b72-56b5-4953-9448-023dbf70669d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AccruedEmployeeSalesCommissionCurrent_1ae5e4ff-ecac-40de-bf0e-c5a2353c704c" xlink:href="ueic-20250331.xsd#ueic_AccruedEmployeeSalesCommissionCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_ueic_AccruedEmployeeSalesCommissionCurrent_1ae5e4ff-ecac-40de-bf0e-c5a2353c704c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalariesCurrent_de9b1a2b-94ae-4433-95c7-a72e307466f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedSalariesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_us-gaap_AccruedSalariesCurrent_de9b1a2b-94ae-4433-95c7-a72e307466f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AccruedSocialInsuranceCurrent_f19cec7b-996a-477f-ba4c-b6090a14bb0d" xlink:href="ueic-20250331.xsd#ueic_AccruedSocialInsuranceCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_ueic_AccruedSocialInsuranceCurrent_f19cec7b-996a-477f-ba4c-b6090a14bb0d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedVacationCurrent_6fb2d608-7a6f-42d1-bc35-3dcdae341c4c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedVacationCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_us-gaap_AccruedVacationCurrent_6fb2d608-7a6f-42d1-bc35-3dcdae341c4c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherEmployeeRelatedLiabilitiesCurrent_c00d2b05-7c89-49e2-8d68-020bd5edc1cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherEmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_us-gaap_OtherEmployeeRelatedLiabilitiesCurrent_c00d2b05-7c89-49e2-8d68-020bd5edc1cf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_9a78c1c3-9fe1-4a7f-8843-b3801314fb03" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_9a78c1c3-9fe1-4a7f-8843-b3801314fb03" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_AccruedSeveranceCurrent_65ac655f-26d3-433e-9320-60acf6533bc9" xlink:href="ueic-20250331.xsd#ueic_AccruedSeveranceCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_AccruedLiabilitiesCurrentLineItems_07313269-a1bc-4f01-a9de-785825371fbe" xlink:to="loc_ueic_AccruedSeveranceCurrent_65ac655f-26d3-433e-9320-60acf6533bc9" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/CommitmentsandContingenciesScheduleofNoncancellablePurchaseCommitmentsDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#CommitmentsandContingenciesScheduleofNoncancellablePurchaseCommitmentsDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/CommitmentsandContingenciesScheduleofNoncancellablePurchaseCommitmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ContingenciesLineItems_43ccc54c-0a0b-40ef-9b4f-f87357eacff0" xlink:href="ueic-20250331.xsd#ueic_ContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ContingenciesTable_59298e8f-9360-43dd-a2bb-df42acd43fd1" xlink:href="ueic-20250331.xsd#ueic_ContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ueic_ContingenciesLineItems_43ccc54c-0a0b-40ef-9b4f-f87357eacff0" xlink:to="loc_ueic_ContingenciesTable_59298e8f-9360-43dd-a2bb-df42acd43fd1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_5d6a76b4-02d7-44c7-9910-c4c965d1cf5e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ueic_ContingenciesTable_59298e8f-9360-43dd-a2bb-df42acd43fd1" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_5d6a76b4-02d7-44c7-9910-c4c965d1cf5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_5d6a76b4-02d7-44c7-9910-c4c965d1cf5e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_5d6a76b4-02d7-44c7-9910-c4c965d1cf5e" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_5d6a76b4-02d7-44c7-9910-c4c965d1cf5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_44a41622-0da8-4dd3-9f31-5fbfbeb989c1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_5d6a76b4-02d7-44c7-9910-c4c965d1cf5e" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_44a41622-0da8-4dd3-9f31-5fbfbeb989c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoriesMember_2b3a6e0f-86b4-4507-8fe1-3a8542506a43" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_44a41622-0da8-4dd3-9f31-5fbfbeb989c1" xlink:to="loc_us-gaap_InventoriesMember_2b3a6e0f-86b4-4507-8fe1-3a8542506a43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentMember_6024f015-2c28-443d-9e8a-be8638956f3e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_44a41622-0da8-4dd3-9f31-5fbfbeb989c1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentMember_6024f015-2c28-443d-9e8a-be8638956f3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_e16b92e7-a06a-4c52-82ef-728be2bc12cb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PurchaseObligationDueInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_43ccc54c-0a0b-40ef-9b4f-f87357eacff0" xlink:to="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_e16b92e7-a06a-4c52-82ef-728be2bc12cb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#CommitmentsandContingenciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:href="ueic-20250331.xsd#ueic_ContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ContingenciesTable_ebb3d19e-c347-4121-a465-7b7768f8d9fd" xlink:href="ueic-20250331.xsd#ueic_ContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_ueic_ContingenciesTable_ebb3d19e-c347-4121-a465-7b7768f8d9fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_249d4f38-6f9a-4edb-80f4-11dad2991564" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ueic_ContingenciesTable_ebb3d19e-c347-4121-a465-7b7768f8d9fd" xlink:to="loc_srt_StatementGeographicalAxis_249d4f38-6f9a-4edb-80f4-11dad2991564" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_249d4f38-6f9a-4edb-80f4-11dad2991564_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_249d4f38-6f9a-4edb-80f4-11dad2991564" xlink:to="loc_srt_SegmentGeographicalDomain_249d4f38-6f9a-4edb-80f4-11dad2991564_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_a99cd327-a7d2-4977-810c-4b03838c3f2a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_249d4f38-6f9a-4edb-80f4-11dad2991564" xlink:to="loc_srt_SegmentGeographicalDomain_a99cd327-a7d2-4977-810c-4b03838c3f2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AsiaMember_e917998a-9ed1-4f5d-90db-834838476dfd" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_AsiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a99cd327-a7d2-4977-810c-4b03838c3f2a" xlink:to="loc_srt_AsiaMember_e917998a-9ed1-4f5d-90db-834838476dfd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MX_2b60398f-bee7-41ac-9b84-6fff48e2ae04" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_MX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a99cd327-a7d2-4977-810c-4b03838c3f2a" xlink:to="loc_country_MX_2b60398f-bee7-41ac-9b84-6fff48e2ae04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_d06bf7f7-d83d-4b21-9c02-37ec1140aada" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ueic_ContingenciesTable_ebb3d19e-c347-4121-a465-7b7768f8d9fd" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_d06bf7f7-d83d-4b21-9c02-37ec1140aada" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_d06bf7f7-d83d-4b21-9c02-37ec1140aada_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_d06bf7f7-d83d-4b21-9c02-37ec1140aada" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_d06bf7f7-d83d-4b21-9c02-37ec1140aada_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_4b32aa3d-4c42-469b-84a2-1d9216f211c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_d06bf7f7-d83d-4b21-9c02-37ec1140aada" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_4b32aa3d-4c42-469b-84a2-1d9216f211c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_e5310a2c-64ff-4ece-bdf8-38b42c94c70e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_4b32aa3d-4c42-469b-84a2-1d9216f211c0" xlink:to="loc_us-gaap_OtherRestructuringMember_e5310a2c-64ff-4ece-bdf8-38b42c94c70e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_f87dbb5e-9939-4d15-8370-d030f905af34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_4b32aa3d-4c42-469b-84a2-1d9216f211c0" xlink:to="loc_us-gaap_EmployeeSeveranceMember_f87dbb5e-9939-4d15-8370-d030f905af34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_NumberOfFactoriesShutDown_a220af16-38f8-45f7-b344-ab009c50cab8" xlink:href="ueic-20250331.xsd#ueic_NumberOfFactoriesShutDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_ueic_NumberOfFactoriesShutDown_a220af16-38f8-45f7-b344-ab009c50cab8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_cda81406-692e-47cf-9351-992773ccfedc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_us-gaap_RestructuringCharges_cda81406-692e-47cf-9351-992773ccfedc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_477b3e73-959b-48ac-a243-0ca04ad943ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringAndRelatedCostCostIncurredToDate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_477b3e73-959b-48ac-a243-0ca04ad943ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyClaimsSettledNumber_f6a5421a-8d37-49c0-b38b-43e5afc402dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LossContingencyClaimsSettledNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_us-gaap_LossContingencyClaimsSettledNumber_f6a5421a-8d37-49c0-b38b-43e5afc402dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyPatentsAllegedlyInfringedNumber_04b5eed0-5336-42f4-bb7b-04c1e84c301f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LossContingencyPatentsAllegedlyInfringedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_us-gaap_LossContingencyPatentsAllegedlyInfringedNumber_04b5eed0-5336-42f4-bb7b-04c1e84c301f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_LossContingencyLawsuitNumberOfFactories_2f7daea2-1fe6-448f-aee2-9956554394c4" xlink:href="ueic-20250331.xsd#ueic_LossContingencyLawsuitNumberOfFactories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_ueic_LossContingencyLawsuitNumberOfFactories_2f7daea2-1fe6-448f-aee2-9956554394c4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_c7c5ca2d-ad8b-4a5b-a9cb-af83785b2ac0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LossContingencyDamagesSoughtValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_c7c5ca2d-ad8b-4a5b-a9cb-af83785b2ac0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDamagesAwardedValue_0aad620b-7105-4f2a-86a3-24ca793680fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LossContingencyDamagesAwardedValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_us-gaap_LossContingencyDamagesAwardedValue_0aad620b-7105-4f2a-86a3-24ca793680fe" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_LossContingencyDamagesAwardedInterestAndCostsValue_8291dad4-48c8-480b-8087-22ab05412168" xlink:href="ueic-20250331.xsd#ueic_LossContingencyDamagesAwardedInterestAndCostsValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ueic_ContingenciesLineItems_4e6fe136-e7ac-446b-a4a6-7613f40656c2" xlink:to="loc_ueic_LossContingencyDamagesAwardedInterestAndCostsValue_8291dad4-48c8-480b-8087-22ab05412168" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/CommitmentsandContingenciesScheduleofRestructuringDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#CommitmentsandContingenciesScheduleofRestructuringDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/CommitmentsandContingenciesScheduleofRestructuringDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_1e7f7114-cff5-459d-b781-8d4b13f38abd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_a0165ac2-11d5-4830-89b2-06055ebbc6bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1e7f7114-cff5-459d-b781-8d4b13f38abd" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_a0165ac2-11d5-4830-89b2-06055ebbc6bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_d73a09ea-25f5-4f19-87ef-2909c5b2fc80" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_a0165ac2-11d5-4830-89b2-06055ebbc6bc" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_d73a09ea-25f5-4f19-87ef-2909c5b2fc80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_d73a09ea-25f5-4f19-87ef-2909c5b2fc80_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_d73a09ea-25f5-4f19-87ef-2909c5b2fc80" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_d73a09ea-25f5-4f19-87ef-2909c5b2fc80_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_6810a448-1d53-4892-9882-f64764d83753" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_d73a09ea-25f5-4f19-87ef-2909c5b2fc80" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_6810a448-1d53-4892-9882-f64764d83753" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_30e410ad-17e5-457e-aceb-ab542a3f2096" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_6810a448-1d53-4892-9882-f64764d83753" xlink:to="loc_us-gaap_EmployeeSeveranceMember_30e410ad-17e5-457e-aceb-ab542a3f2096" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_36eb399a-821f-4fde-bbf0-c10edb2d68b9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_6810a448-1d53-4892-9882-f64764d83753" xlink:to="loc_us-gaap_OtherRestructuringMember_36eb399a-821f-4fde-bbf0-c10edb2d68b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_e2c6d878-54ea-462e-9b9b-85b74568ea24" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1e7f7114-cff5-459d-b781-8d4b13f38abd" xlink:to="loc_us-gaap_RestructuringReserveRollForward_e2c6d878-54ea-462e-9b9b-85b74568ea24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_b947b075-8a0b-49d6-a589-0abfaf39301b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_e2c6d878-54ea-462e-9b9b-85b74568ea24" xlink:to="loc_us-gaap_RestructuringReserve_b947b075-8a0b-49d6-a589-0abfaf39301b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_86334b44-c4a1-4930-a2e7-06807f0dac9b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_e2c6d878-54ea-462e-9b9b-85b74568ea24" xlink:to="loc_us-gaap_RestructuringCharges_86334b44-c4a1-4930-a2e7-06807f0dac9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_a04fc16a-3bb8-4cee-bb9d-ddcc7c6f0302" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_e2c6d878-54ea-462e-9b9b-85b74568ea24" xlink:to="loc_us-gaap_PaymentsForRestructuring_a04fc16a-3bb8-4cee-bb9d-ddcc7c6f0302" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_da120040-2c54-44bf-8f48-467c8f43b5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_eadda3d8-ad85-4b4c-b5de-d439bb85ff3a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringAndRelatedCostCostIncurredToDate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1e7f7114-cff5-459d-b781-8d4b13f38abd" xlink:to="loc_us-gaap_RestructuringAndRelatedCostCostIncurredToDate1_eadda3d8-ad85-4b4c-b5de-d439bb85ff3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_8467c4c7-a710-416b-aecc-680952e85a5a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1e7f7114-cff5-459d-b781-8d4b13f38abd" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_8467c4c7-a710-416b-aecc-680952e85a5a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/TreasuryStockNarrativeDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#TreasuryStockNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/TreasuryStockNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityClassOfTreasuryStockLineItems_105bc28d-b929-49df-8a91-7eab9d8970e2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityClassOfTreasuryStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfTreasuryStockTable_4becb311-12e7-44d3-8209-51fc84d94413" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfTreasuryStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_105bc28d-b929-49df-8a91-7eab9d8970e2" xlink:to="loc_us-gaap_ClassOfTreasuryStockTable_4becb311-12e7-44d3-8209-51fc84d94413" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_5c6f9d11-3056-4ef8-8514-d91bc7900b4e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfTreasuryStockTable_4becb311-12e7-44d3-8209-51fc84d94413" xlink:to="loc_srt_ShareRepurchaseProgramAxis_5c6f9d11-3056-4ef8-8514-d91bc7900b4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_5c6f9d11-3056-4ef8-8514-d91bc7900b4e_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_5c6f9d11-3056-4ef8-8514-d91bc7900b4e" xlink:to="loc_srt_ShareRepurchaseProgramDomain_5c6f9d11-3056-4ef8-8514-d91bc7900b4e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_17c07b3a-e9c6-4a34-ac1b-bd7742396e2e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_5c6f9d11-3056-4ef8-8514-d91bc7900b4e" xlink:to="loc_srt_ShareRepurchaseProgramDomain_17c07b3a-e9c6-4a34-ac1b-bd7742396e2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_October2023ProgramMember_f1685a42-7dbf-42c0-8d49-492cb0694163" xlink:href="ueic-20250331.xsd#ueic_October2023ProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_17c07b3a-e9c6-4a34-ac1b-bd7742396e2e" xlink:to="loc_ueic_October2023ProgramMember_f1685a42-7dbf-42c0-8d49-492cb0694163" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_966b6e06-9281-4b8b-b9ee-7c5d565051dc" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_105bc28d-b929-49df-8a91-7eab9d8970e2" xlink:to="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_966b6e06-9281-4b8b-b9ee-7c5d565051dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_c0b0fb70-a8c2-42b9-8cbb-f84ba1c36352" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_105bc28d-b929-49df-8a91-7eab9d8970e2" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_c0b0fb70-a8c2-42b9-8cbb-f84ba1c36352" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_f260ea2d-d87c-4b80-8594-6c4594f0ebb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_105bc28d-b929-49df-8a91-7eab9d8970e2" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_f260ea2d-d87c-4b80-8594-6c4594f0ebb2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_e387e498-9b5d-43dd-8ac0-57e6e9bf27c2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_105bc28d-b929-49df-8a91-7eab9d8970e2" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_e387e498-9b5d-43dd-8ac0-57e6e9bf27c2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/TreasuryStockRepurchasedSharesofCommonStockDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#TreasuryStockRepurchasedSharesofCommonStockDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/TreasuryStockRepurchasedSharesofCommonStockDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityClassOfTreasuryStockLineItems_9914c0a5-1b8d-4dcb-825a-5c506bbf9f5b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityClassOfTreasuryStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfTreasuryStockTable_6da5f28f-e4a3-4be2-bd1c-042269a6a1cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfTreasuryStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_9914c0a5-1b8d-4dcb-825a-5c506bbf9f5b" xlink:to="loc_us-gaap_ClassOfTreasuryStockTable_6da5f28f-e4a3-4be2-bd1c-042269a6a1cf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_81077824-b68b-4a6e-9fa2-f9adf8dbbda6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfTreasuryStockTable_6da5f28f-e4a3-4be2-bd1c-042269a6a1cf" xlink:to="loc_srt_ShareRepurchaseProgramAxis_81077824-b68b-4a6e-9fa2-f9adf8dbbda6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_81077824-b68b-4a6e-9fa2-f9adf8dbbda6_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_81077824-b68b-4a6e-9fa2-f9adf8dbbda6" xlink:to="loc_srt_ShareRepurchaseProgramDomain_81077824-b68b-4a6e-9fa2-f9adf8dbbda6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_39626f8e-365a-4be0-997b-c9834509ad16" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_81077824-b68b-4a6e-9fa2-f9adf8dbbda6" xlink:to="loc_srt_ShareRepurchaseProgramDomain_39626f8e-365a-4be0-997b-c9834509ad16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_OpenMarketShareRepurchaseMember_43697292-f3d6-4df9-b4cc-86f5e5633252" xlink:href="ueic-20250331.xsd#ueic_OpenMarketShareRepurchaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_39626f8e-365a-4be0-997b-c9834509ad16" xlink:to="loc_ueic_OpenMarketShareRepurchaseMember_43697292-f3d6-4df9-b4cc-86f5e5633252" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_StockBasedCompensationShareRepurchaseMember_c4f56fdf-b065-428c-a8f5-6f2bcc3035de" xlink:href="ueic-20250331.xsd#ueic_StockBasedCompensationShareRepurchaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_39626f8e-365a-4be0-997b-c9834509ad16" xlink:to="loc_ueic_StockBasedCompensationShareRepurchaseMember_c4f56fdf-b065-428c-a8f5-6f2bcc3035de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_79aee735-afc0-4f73-831d-126dd3262219" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_9914c0a5-1b8d-4dcb-825a-5c506bbf9f5b" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_79aee735-afc0-4f73-831d-126dd3262219" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_10fc3fb5-21cb-41c5-bcbd-e86219556573" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_9914c0a5-1b8d-4dcb-825a-5c506bbf9f5b" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_10fc3fb5-21cb-41c5-bcbd-e86219556573" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/StockBasedCompensationStockbasedCompensationExpenseandRelatedIncomeTaxBenefitDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#StockBasedCompensationStockbasedCompensationExpenseandRelatedIncomeTaxBenefitDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/StockBasedCompensationStockbasedCompensationExpenseandRelatedIncomeTaxBenefitDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_97096735-95da-49d1-9730-cd10c6739076" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_820e7d42-34b2-4f3e-b0d3-64d32db8dfd3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_97096735-95da-49d1-9730-cd10c6739076" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_820e7d42-34b2-4f3e-b0d3-64d32db8dfd3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_34cdea33-d847-40a4-ac91-26fc8a63f79c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_820e7d42-34b2-4f3e-b0d3-64d32db8dfd3" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_34cdea33-d847-40a4-ac91-26fc8a63f79c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_34cdea33-d847-40a4-ac91-26fc8a63f79c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_34cdea33-d847-40a4-ac91-26fc8a63f79c" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_34cdea33-d847-40a4-ac91-26fc8a63f79c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_414c000f-1186-47e4-811b-75d2588b9402" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_34cdea33-d847-40a4-ac91-26fc8a63f79c" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_414c000f-1186-47e4-811b-75d2588b9402" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_9eb0f900-b09b-43c5-97b7-e120c2d1e66a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_414c000f-1186-47e4-811b-75d2588b9402" xlink:to="loc_us-gaap_CostOfSalesMember_9eb0f900-b09b-43c5-97b7-e120c2d1e66a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_e8bd4b1c-656a-465d-b973-58a1c22b55f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_414c000f-1186-47e4-811b-75d2588b9402" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_e8bd4b1c-656a-465d-b973-58a1c22b55f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_73e441be-1386-4e36-9d14-d322874a5c10" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_414c000f-1186-47e4-811b-75d2588b9402" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_73e441be-1386-4e36-9d14-d322874a5c10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusAxis_62f5cdc4-d971-4822-a818-ce9e62085738" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_820e7d42-34b2-4f3e-b0d3-64d32db8dfd3" xlink:to="loc_us-gaap_GranteeStatusAxis_62f5cdc4-d971-4822-a818-ce9e62085738" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_62f5cdc4-d971-4822-a818-ce9e62085738_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GranteeStatusAxis_62f5cdc4-d971-4822-a818-ce9e62085738" xlink:to="loc_us-gaap_GranteeStatusDomain_62f5cdc4-d971-4822-a818-ce9e62085738_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_4818b696-cf79-4c97-80a9-4c0059eaedaf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GranteeStatusAxis_62f5cdc4-d971-4822-a818-ce9e62085738" xlink:to="loc_us-gaap_GranteeStatusDomain_4818b696-cf79-4c97-80a9-4c0059eaedaf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedPaymentArrangementEmployeeMember_17a371b4-cc41-4ad3-a6cb-ec73eda9adb6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedPaymentArrangementEmployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_4818b696-cf79-4c97-80a9-4c0059eaedaf" xlink:to="loc_us-gaap_ShareBasedPaymentArrangementEmployeeMember_17a371b4-cc41-4ad3-a6cb-ec73eda9adb6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_67ad0f24-12b0-4d39-a394-36ab1699a444" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedPaymentArrangementNonemployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_4818b696-cf79-4c97-80a9-4c0059eaedaf" xlink:to="loc_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_67ad0f24-12b0-4d39-a394-36ab1699a444" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_a47c8215-f884-41f8-a84a-854ee03cafaf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_97096735-95da-49d1-9730-cd10c6739076" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_a47c8215-f884-41f8-a84a-854ee03cafaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_a7abac25-f966-47ed-ab60-8ceea508d728" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_97096735-95da-49d1-9730-cd10c6739076" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_a7abac25-f966-47ed-ab60-8ceea508d728" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/StockBasedCompensationNonVestedRestrictedStockandPerformanceStockAwardActivityDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#StockBasedCompensationNonVestedRestrictedStockandPerformanceStockAwardActivityDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/StockBasedCompensationNonVestedRestrictedStockandPerformanceStockAwardActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0011a2ff-a219-4287-a6e1-eed72d747929" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c926317c-1d36-4456-8188-448e7a0a6b21" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0011a2ff-a219-4287-a6e1-eed72d747929" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c926317c-1d36-4456-8188-448e7a0a6b21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_3dbbbcae-192c-4e11-936c-6df33e54c366" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c926317c-1d36-4456-8188-448e7a0a6b21" xlink:to="loc_us-gaap_AwardTypeAxis_3dbbbcae-192c-4e11-936c-6df33e54c366" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3dbbbcae-192c-4e11-936c-6df33e54c366_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_3dbbbcae-192c-4e11-936c-6df33e54c366" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3dbbbcae-192c-4e11-936c-6df33e54c366_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3386105b-1649-4b5f-ab9d-955a8b804b4d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_3dbbbcae-192c-4e11-936c-6df33e54c366" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3386105b-1649-4b5f-ab9d-955a8b804b4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_9b30f36e-19b2-46d4-a61e-2b3ed915a92e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3386105b-1649-4b5f-ab9d-955a8b804b4d" xlink:to="loc_us-gaap_RestrictedStockMember_9b30f36e-19b2-46d4-a61e-2b3ed915a92e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_4e226ee2-c432-4c34-bec4-c2f3656221b0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3386105b-1649-4b5f-ab9d-955a8b804b4d" xlink:to="loc_us-gaap_PerformanceSharesMember_4e226ee2-c432-4c34-bec4-c2f3656221b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10af5bbe-3989-4cd9-a978-a7618cb78f5c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0011a2ff-a219-4287-a6e1-eed72d747929" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10af5bbe-3989-4cd9-a978-a7618cb78f5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_135c0c08-0774-4a61-85f9-3a2bc5051671" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10af5bbe-3989-4cd9-a978-a7618cb78f5c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_135c0c08-0774-4a61-85f9-3a2bc5051671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_72d119f5-8295-447f-899e-f203a9f37edd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10af5bbe-3989-4cd9-a978-a7618cb78f5c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_72d119f5-8295-447f-899e-f203a9f37edd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_1075fdf7-c6b1-4725-a786-d3fced6b7eb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10af5bbe-3989-4cd9-a978-a7618cb78f5c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_1075fdf7-c6b1-4725-a786-d3fced6b7eb2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_e207bc09-1698-47f9-8076-8da088f629e7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_10af5bbe-3989-4cd9-a978-a7618cb78f5c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_e207bc09-1698-47f9-8076-8da088f629e7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_60c9db91-0e84-4033-bb78-00dbb26b3366" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0a8aa38-e035-4d2c-bdf7-77cfc40fa250" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0011a2ff-a219-4287-a6e1-eed72d747929" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0a8aa38-e035-4d2c-bdf7-77cfc40fa250" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_61f68e10-1a2e-473a-8400-5b57bdae58b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0a8aa38-e035-4d2c-bdf7-77cfc40fa250" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_61f68e10-1a2e-473a-8400-5b57bdae58b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_118c5340-b260-4e86-8dd9-873d965d63e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0a8aa38-e035-4d2c-bdf7-77cfc40fa250" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_118c5340-b260-4e86-8dd9-873d965d63e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9f8245a0-b812-4e65-a7d1-77b1ce984904" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0a8aa38-e035-4d2c-bdf7-77cfc40fa250" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9f8245a0-b812-4e65-a7d1-77b1ce984904" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_ca91ec67-e10b-46d1-948e-8e2905cb409d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_b0a8aa38-e035-4d2c-bdf7-77cfc40fa250" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_ca91ec67-e10b-46d1-948e-8e2905cb409d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_7fdc6ab0-71c3-434a-a93e-f72bee4e5d10" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/StockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#StockBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d38fd27-21fa-4ea0-b593-5459a3157e6b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b1167c32-6d84-4b32-9d90-f1d4c6b96fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d38fd27-21fa-4ea0-b593-5459a3157e6b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b1167c32-6d84-4b32-9d90-f1d4c6b96fd0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_3ecb50f0-ae78-455b-b5bf-c9a49449f748" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b1167c32-6d84-4b32-9d90-f1d4c6b96fd0" xlink:to="loc_us-gaap_AwardTypeAxis_3ecb50f0-ae78-455b-b5bf-c9a49449f748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3ecb50f0-ae78-455b-b5bf-c9a49449f748_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_3ecb50f0-ae78-455b-b5bf-c9a49449f748" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3ecb50f0-ae78-455b-b5bf-c9a49449f748_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e9b6853-cbc2-499a-8800-daa84a652cc9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_3ecb50f0-ae78-455b-b5bf-c9a49449f748" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e9b6853-cbc2-499a-8800-daa84a652cc9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_18963123-fb57-454c-8ccb-b7eb8b531662" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e9b6853-cbc2-499a-8800-daa84a652cc9" xlink:to="loc_us-gaap_RestrictedStockMember_18963123-fb57-454c-8ccb-b7eb8b531662" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_b2a9e5fc-0e9c-4477-b019-81dcdcf6f296" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e9b6853-cbc2-499a-8800-daa84a652cc9" xlink:to="loc_us-gaap_PerformanceSharesMember_b2a9e5fc-0e9c-4477-b019-81dcdcf6f296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_87c77b4f-a9f2-4d41-a6eb-34369e0b0db2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e9b6853-cbc2-499a-8800-daa84a652cc9" xlink:to="loc_us-gaap_EmployeeStockOptionMember_87c77b4f-a9f2-4d41-a6eb-34369e0b0db2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_7790082f-b82f-4651-9ff0-cae19277e838" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b1167c32-6d84-4b32-9d90-f1d4c6b96fd0" xlink:to="loc_srt_TitleOfIndividualAxis_7790082f-b82f-4651-9ff0-cae19277e838" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_7790082f-b82f-4651-9ff0-cae19277e838_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_7790082f-b82f-4651-9ff0-cae19277e838" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_7790082f-b82f-4651-9ff0-cae19277e838_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_3af78f57-96a2-4783-b481-837706fe5eb3" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_7790082f-b82f-4651-9ff0-cae19277e838" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_3af78f57-96a2-4783-b481-837706fe5eb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_CertainExecutiveEmployeesMember_a8fd2dd2-0bf0-4ef6-949f-01ec7f9fa04f" xlink:href="ueic-20250331.xsd#ueic_CertainExecutiveEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_3af78f57-96a2-4783-b481-837706fe5eb3" xlink:to="loc_ueic_CertainExecutiveEmployeesMember_a8fd2dd2-0bf0-4ef6-949f-01ec7f9fa04f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_19ecda8d-9d4f-40b7-bad6-c7ba6b2f65c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_b1167c32-6d84-4b32-9d90-f1d4c6b96fd0" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_19ecda8d-9d4f-40b7-bad6-c7ba6b2f65c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_19ecda8d-9d4f-40b7-bad6-c7ba6b2f65c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_19ecda8d-9d4f-40b7-bad6-c7ba6b2f65c6" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_19ecda8d-9d4f-40b7-bad6-c7ba6b2f65c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_de4337bc-79f5-4288-acbe-2d1458a81157" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_19ecda8d-9d4f-40b7-bad6-c7ba6b2f65c6" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_de4337bc-79f5-4288-acbe-2d1458a81157" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_af84082f-54ab-4a13-a3b8-c26a536b4f87" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_de4337bc-79f5-4288-acbe-2d1458a81157" xlink:to="loc_us-gaap_SubsequentEventMember_af84082f-54ab-4a13-a3b8-c26a536b4f87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_a810c470-0881-4876-95e9-ccc33323e2ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d38fd27-21fa-4ea0-b593-5459a3157e6b" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_a810c470-0881-4876-95e9-ccc33323e2ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_09d13c3f-64a9-4f57-a400-a087cd6b8836" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d38fd27-21fa-4ea0-b593-5459a3157e6b" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_09d13c3f-64a9-4f57-a400-a087cd6b8836" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_f8d67521-4188-4049-b001-2389ed7dc866" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d38fd27-21fa-4ea0-b593-5459a3157e6b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_f8d67521-4188-4049-b001-2389ed7dc866" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_41bde37f-000a-439d-aefc-fa12fe3efd51" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d38fd27-21fa-4ea0-b593-5459a3157e6b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_41bde37f-000a-439d-aefc-fa12fe3efd51" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/StockBasedCompensationWeightedAverageAssumptionsDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#StockBasedCompensationWeightedAverageAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/StockBasedCompensationWeightedAverageAssumptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c8fc6406-59d9-489f-a2e7-e48018e70e0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_1f480938-2db2-4d1a-bba0-e1e573218abc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c8fc6406-59d9-489f-a2e7-e48018e70e0d" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_1f480938-2db2-4d1a-bba0-e1e573218abc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_6a9c201d-ce20-4a2a-a066-754b23e25405" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_1f480938-2db2-4d1a-bba0-e1e573218abc" xlink:to="loc_us-gaap_AwardTypeAxis_6a9c201d-ce20-4a2a-a066-754b23e25405" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6a9c201d-ce20-4a2a-a066-754b23e25405_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_6a9c201d-ce20-4a2a-a066-754b23e25405" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6a9c201d-ce20-4a2a-a066-754b23e25405_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d58219ce-66ca-485f-aa09-b1584a553562" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_6a9c201d-ce20-4a2a-a066-754b23e25405" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d58219ce-66ca-485f-aa09-b1584a553562" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_ab08e403-db01-47f9-8008-b2bffefcb01e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d58219ce-66ca-485f-aa09-b1584a553562" xlink:to="loc_us-gaap_PerformanceSharesMember_ab08e403-db01-47f9-8008-b2bffefcb01e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_9a2b8d1d-fbdd-4435-873b-d59a8650122b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c8fc6406-59d9-489f-a2e7-e48018e70e0d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_9a2b8d1d-fbdd-4435-873b-d59a8650122b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_4a1fd280-513d-4d36-af7e-9637d8865d8f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c8fc6406-59d9-489f-a2e7-e48018e70e0d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_4a1fd280-513d-4d36-af7e-9637d8865d8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_2e72ed72-9b5d-43eb-be3f-a5a71d95f382" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c8fc6406-59d9-489f-a2e7-e48018e70e0d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_2e72ed72-9b5d-43eb-be3f-a5a71d95f382" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_09c6201c-a66a-4e1a-b0c9-04a9b8efce30" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c8fc6406-59d9-489f-a2e7-e48018e70e0d" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_09c6201c-a66a-4e1a-b0c9-04a9b8efce30" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/EarningsLossPerShareSecuritiesExcludedfromtheComputationofDilutedEarningsLossPerCommonShareDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#EarningsLossPerShareSecuritiesExcludedfromtheComputationofDilutedEarningsLossPerCommonShareDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/EarningsLossPerShareSecuritiesExcludedfromtheComputationofDilutedEarningsLossPerCommonShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_6bf473fb-30b4-4df5-9e5e-66f9743b657d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_aa4d7c75-bcbc-4818-b1aa-3bf97098510b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_6bf473fb-30b4-4df5-9e5e-66f9743b657d" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_aa4d7c75-bcbc-4818-b1aa-3bf97098510b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_19d5c387-a5b0-40b4-83ec-b4d9f798ac41" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_aa4d7c75-bcbc-4818-b1aa-3bf97098510b" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_19d5c387-a5b0-40b4-83ec-b4d9f798ac41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_19d5c387-a5b0-40b4-83ec-b4d9f798ac41_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_19d5c387-a5b0-40b4-83ec-b4d9f798ac41" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_19d5c387-a5b0-40b4-83ec-b4d9f798ac41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_4d98fb45-3ee6-4202-8555-5e6bf27b28e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_19d5c387-a5b0-40b4-83ec-b4d9f798ac41" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_4d98fb45-3ee6-4202-8555-5e6bf27b28e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_cc6c4bd2-a20f-4e02-9634-36c9b13dd93c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_4d98fb45-3ee6-4202-8555-5e6bf27b28e3" xlink:to="loc_us-gaap_EmployeeStockOptionMember_cc6c4bd2-a20f-4e02-9634-36c9b13dd93c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_5b4af737-2230-4e1a-8d38-6e4dd883efbd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_4d98fb45-3ee6-4202-8555-5e6bf27b28e3" xlink:to="loc_us-gaap_RestrictedStockMember_5b4af737-2230-4e1a-8d38-6e4dd883efbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_a45c23a7-9305-4313-b892-c5d87d2a32d9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_4d98fb45-3ee6-4202-8555-5e6bf27b28e3" xlink:to="loc_us-gaap_PerformanceSharesMember_a45c23a7-9305-4313-b892-c5d87d2a32d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_2843cd91-6f51-4c30-9306-a3af638007b1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_6bf473fb-30b4-4df5-9e5e-66f9743b657d" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_2843cd91-6f51-4c30-9306-a3af638007b1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/DerivativesTotalNetFairValueofDerivativesDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#DerivativesTotalNetFairValueofDerivativesDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/DerivativesTotalNetFairValueofDerivativesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_64c29d65-8962-44f3-af4b-869a5a4340de" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_8e68497f-aa7b-4395-8b2e-fdff6f26906f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_64c29d65-8962-44f3-af4b-869a5a4340de" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_8e68497f-aa7b-4395-8b2e-fdff6f26906f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_59eb6ba5-ca99-4ff1-8aea-6c7fa7a1c581" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_8e68497f-aa7b-4395-8b2e-fdff6f26906f" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_59eb6ba5-ca99-4ff1-8aea-6c7fa7a1c581" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_59eb6ba5-ca99-4ff1-8aea-6c7fa7a1c581_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_59eb6ba5-ca99-4ff1-8aea-6c7fa7a1c581" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_59eb6ba5-ca99-4ff1-8aea-6c7fa7a1c581_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_c6384c5d-aa13-447b-9c09-62b38d737832" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_59eb6ba5-ca99-4ff1-8aea-6c7fa7a1c581" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_c6384c5d-aa13-447b-9c09-62b38d737832" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_fa5f0eb5-d3a5-4ca1-b70a-60657b865009" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_c6384c5d-aa13-447b-9c09-62b38d737832" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_fa5f0eb5-d3a5-4ca1-b70a-60657b865009" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f04ce20b-73b1-48ec-b370-8cea41553eda" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_8e68497f-aa7b-4395-8b2e-fdff6f26906f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f04ce20b-73b1-48ec-b370-8cea41553eda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f04ce20b-73b1-48ec-b370-8cea41553eda_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f04ce20b-73b1-48ec-b370-8cea41553eda" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f04ce20b-73b1-48ec-b370-8cea41553eda_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4e3c7382-15ad-4689-9d21-341710c05b4e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f04ce20b-73b1-48ec-b370-8cea41553eda" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4e3c7382-15ad-4689-9d21-341710c05b4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_58df9a1b-ca7e-402d-9d30-139327a31b74" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4e3c7382-15ad-4689-9d21-341710c05b4e" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_58df9a1b-ca7e-402d-9d30-139327a31b74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_c92f6bd6-7289-477e-a488-8fbb04874724" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4e3c7382-15ad-4689-9d21-341710c05b4e" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_c92f6bd6-7289-477e-a488-8fbb04874724" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_696f1194-c22f-47d3-a935-5a598dc820ec" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_4e3c7382-15ad-4689-9d21-341710c05b4e" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_696f1194-c22f-47d3-a935-5a598dc820ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_e3fffc74-596b-4e92-9d7f-5454b93264b0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_8e68497f-aa7b-4395-8b2e-fdff6f26906f" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_e3fffc74-596b-4e92-9d7f-5454b93264b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_e3fffc74-596b-4e92-9d7f-5454b93264b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_e3fffc74-596b-4e92-9d7f-5454b93264b0" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_e3fffc74-596b-4e92-9d7f-5454b93264b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_788e7c8f-d391-4b24-ad35-615da8cc811d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_e3fffc74-596b-4e92-9d7f-5454b93264b0" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_788e7c8f-d391-4b24-ad35-615da8cc811d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_9f558507-4fe1-483d-a71f-a8444f4a0332" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_788e7c8f-d391-4b24-ad35-615da8cc811d" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_9f558507-4fe1-483d-a71f-a8444f4a0332" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_c7cdd8e3-1f65-4095-8122-abdc90216b71" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_8e68497f-aa7b-4395-8b2e-fdff6f26906f" xlink:to="loc_us-gaap_HedgingDesignationAxis_c7cdd8e3-1f65-4095-8122-abdc90216b71" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_c7cdd8e3-1f65-4095-8122-abdc90216b71_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_c7cdd8e3-1f65-4095-8122-abdc90216b71" xlink:to="loc_us-gaap_HedgingDesignationDomain_c7cdd8e3-1f65-4095-8122-abdc90216b71_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_26934541-d0d5-4fbf-b295-408e36fadd72" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_c7cdd8e3-1f65-4095-8122-abdc90216b71" xlink:to="loc_us-gaap_HedgingDesignationDomain_26934541-d0d5-4fbf-b295-408e36fadd72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_dee8aa49-6e9e-4439-a84e-b1d6497d86d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_26934541-d0d5-4fbf-b295-408e36fadd72" xlink:to="loc_us-gaap_NondesignatedMember_dee8aa49-6e9e-4439-a84e-b1d6497d86d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_ca5641e4-cd47-4644-abd7-07e3bb98f131" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_64c29d65-8962-44f3-af4b-869a5a4340de" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_ca5641e4-cd47-4644-abd7-07e3bb98f131" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/DerivativesNarrativeDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#DerivativesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/DerivativesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_98ce1dd4-d291-4a10-819d-1331bd1a2cd6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a812ab87-59b7-4c69-b7ce-724c986803ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_98ce1dd4-d291-4a10-819d-1331bd1a2cd6" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a812ab87-59b7-4c69-b7ce-724c986803ab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_3475a6c0-1802-4716-aa1f-4e5ec187e48c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a812ab87-59b7-4c69-b7ce-724c986803ab" xlink:to="loc_us-gaap_HedgingDesignationAxis_3475a6c0-1802-4716-aa1f-4e5ec187e48c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_3475a6c0-1802-4716-aa1f-4e5ec187e48c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_3475a6c0-1802-4716-aa1f-4e5ec187e48c" xlink:to="loc_us-gaap_HedgingDesignationDomain_3475a6c0-1802-4716-aa1f-4e5ec187e48c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_9faca150-05ae-4a03-abc7-97ae795a54df" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_3475a6c0-1802-4716-aa1f-4e5ec187e48c" xlink:to="loc_us-gaap_HedgingDesignationDomain_9faca150-05ae-4a03-abc7-97ae795a54df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_95bf7910-06b9-4c06-ab1d-b32f56abea00" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_9faca150-05ae-4a03-abc7-97ae795a54df" xlink:to="loc_us-gaap_NondesignatedMember_95bf7910-06b9-4c06-ab1d-b32f56abea00" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_4669b2c6-0ee6-48d2-af8d-566b4422d2eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_a812ab87-59b7-4c69-b7ce-724c986803ab" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_4669b2c6-0ee6-48d2-af8d-566b4422d2eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_4669b2c6-0ee6-48d2-af8d-566b4422d2eb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_4669b2c6-0ee6-48d2-af8d-566b4422d2eb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_4669b2c6-0ee6-48d2-af8d-566b4422d2eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_1b993ebc-f74f-4bd6-9c60-97ebf940d8b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_4669b2c6-0ee6-48d2-af8d-566b4422d2eb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_1b993ebc-f74f-4bd6-9c60-97ebf940d8b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_55ca457f-b513-48c4-8ca9-3110b68a8c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_1b993ebc-f74f-4bd6-9c60-97ebf940d8b5" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_55ca457f-b513-48c4-8ca9-3110b68a8c5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_bf7d6d80-da81-4ab8-83de-85523b1bec54" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_98ce1dd4-d291-4a10-819d-1331bd1a2cd6" xlink:to="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_bf7d6d80-da81-4ab8-83de-85523b1bec54" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/DerivativesForeignCurrencyExchangeContractsDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#DerivativesForeignCurrencyExchangeContractsDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/DerivativesForeignCurrencyExchangeContractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_725bec34-d789-4b86-b7b1-30337baaf5e1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_e077e8b6-415d-43d7-91b8-010ade3719da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_725bec34-d789-4b86-b7b1-30337baaf5e1" xlink:to="loc_us-gaap_DerivativeTable_e077e8b6-415d-43d7-91b8-010ade3719da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_2c4ea83f-0051-4435-aef7-eb70e6a94b8a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e077e8b6-415d-43d7-91b8-010ade3719da" xlink:to="loc_us-gaap_HedgingDesignationAxis_2c4ea83f-0051-4435-aef7-eb70e6a94b8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_2c4ea83f-0051-4435-aef7-eb70e6a94b8a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_2c4ea83f-0051-4435-aef7-eb70e6a94b8a" xlink:to="loc_us-gaap_HedgingDesignationDomain_2c4ea83f-0051-4435-aef7-eb70e6a94b8a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_9ad038af-e18b-4007-8046-8014e0babf2f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_2c4ea83f-0051-4435-aef7-eb70e6a94b8a" xlink:to="loc_us-gaap_HedgingDesignationDomain_9ad038af-e18b-4007-8046-8014e0babf2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_210db127-e3b2-4e2b-9795-019bea2f425c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_9ad038af-e18b-4007-8046-8014e0babf2f" xlink:to="loc_us-gaap_NondesignatedMember_210db127-e3b2-4e2b-9795-019bea2f425c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_14fa3118-22b1-479b-8cb9-8ce37c609df7" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e077e8b6-415d-43d7-91b8-010ade3719da" xlink:to="loc_srt_CurrencyAxis_14fa3118-22b1-479b-8cb9-8ce37c609df7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_14fa3118-22b1-479b-8cb9-8ce37c609df7_default" xlink:href="https://xbrl.sec.gov/currency/2024/currency-2024.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_14fa3118-22b1-479b-8cb9-8ce37c609df7" xlink:to="loc_currency_AllCurrenciesDomain_14fa3118-22b1-479b-8cb9-8ce37c609df7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_4934f80d-ee16-491d-bfa2-f5567f4981d8" xlink:href="https://xbrl.sec.gov/currency/2024/currency-2024.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_14fa3118-22b1-479b-8cb9-8ce37c609df7" xlink:to="loc_currency_AllCurrenciesDomain_4934f80d-ee16-491d-bfa2-f5567f4981d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_CNY_4d8194d5-7faf-45cf-99d3-451d402328cf" xlink:href="https://xbrl.sec.gov/currency/2024/currency-2024.xsd#currency_CNY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_4934f80d-ee16-491d-bfa2-f5567f4981d8" xlink:to="loc_currency_CNY_4d8194d5-7faf-45cf-99d3-451d402328cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_cb84dbb5-cdfb-40d4-a95b-657f9be4ca37" xlink:href="https://xbrl.sec.gov/currency/2024/currency-2024.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_4934f80d-ee16-491d-bfa2-f5567f4981d8" xlink:to="loc_currency_EUR_cb84dbb5-cdfb-40d4-a95b-657f9be4ca37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_495ce279-47a4-4d5f-a5d8-10074545c5e0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_725bec34-d789-4b86-b7b1-30337baaf5e1" xlink:to="loc_us-gaap_DerivativeNotionalAmount_495ce279-47a4-4d5f-a5d8-10074545c5e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeForwardExchangeRate1_26ef0b7c-218b-4ba8-9308-1f4a476df4d0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeForwardExchangeRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_725bec34-d789-4b86-b7b1-30337baaf5e1" xlink:to="loc_us-gaap_DerivativeForwardExchangeRate1_26ef0b7c-218b-4ba8-9308-1f4a476df4d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_938ac3a9-7501-4f7a-a88f-8d4c643c845e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_725bec34-d789-4b86-b7b1-30337baaf5e1" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_938ac3a9-7501-4f7a-a88f-8d4c643c845e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.uei.com/role/ReportableSegmentDetails" xlink:type="simple" xlink:href="ueic-20250331.xsd#ReportableSegmentDetails"/>
  <link:definitionLink xlink:role="http://www.uei.com/role/ReportableSegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_16c4507e-bf9a-40c3-ab25-0d11f11368cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:to="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_16c4507e-bf9a-40c3-ab25-0d11f11368cd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9ec4eda0-9bc2-4a06-9619-98b435f57b12" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_16c4507e-bf9a-40c3-ab25-0d11f11368cd" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9ec4eda0-9bc2-4a06-9619-98b435f57b12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9ec4eda0-9bc2-4a06-9619-98b435f57b12_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9ec4eda0-9bc2-4a06-9619-98b435f57b12" xlink:to="loc_us-gaap_SegmentDomain_9ec4eda0-9bc2-4a06-9619-98b435f57b12_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_faea26f2-d637-4a20-a49a-7851948eee5c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9ec4eda0-9bc2-4a06-9619-98b435f57b12" xlink:to="loc_us-gaap_SegmentDomain_faea26f2-d637-4a20-a49a-7851948eee5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_ReportableSegmentMember_407a558a-0b8b-42ef-bfcd-ef73f2ff61ec" xlink:href="ueic-20250331.xsd#ueic_ReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_faea26f2-d637-4a20-a49a-7851948eee5c" xlink:to="loc_ueic_ReportableSegmentMember_407a558a-0b8b-42ef-bfcd-ef73f2ff61ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9b02a195-6c53-4957-b86a-6b548406d955" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9b02a195-6c53-4957-b86a-6b548406d955" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_44c3ece1-82c8-452b-a374-1466291c80ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_44c3ece1-82c8-452b-a374-1466291c80ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_SegmentReportingResearchAndDevelopmentExpenses_e36198bf-2873-4371-ac4e-18c49a17ad32" xlink:href="ueic-20250331.xsd#ueic_SegmentReportingResearchAndDevelopmentExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:to="loc_ueic_SegmentReportingResearchAndDevelopmentExpenses_e36198bf-2873-4371-ac4e-18c49a17ad32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_f2c98fd1-dff0-479e-b378-ec8571942472" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:to="loc_us-gaap_OperatingExpenses_f2c98fd1-dff0-479e-b378-ec8571942472" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_37b674ee-d7b4-4a81-be13-74e3dbad812d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_37b674ee-d7b4-4a81-be13-74e3dbad812d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ueic_SegmentReportingNetIncomeLoss_f19212b2-20d9-4dc6-b9ec-cbb46e48ac86" xlink:href="ueic-20250331.xsd#ueic_SegmentReportingNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_f75bc13a-192f-4670-a10c-b9e2747c27eb" xlink:to="loc_ueic_SegmentReportingNetIncomeLoss_f19212b2-20d9-4dc6-b9ec-cbb46e48ac86" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-roles-2024.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="arc" order="41"/>
  </link:definitionLink>
</link:linkbase>
