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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:7046daff-75eb-4414-b388-201af744c24f,g:66d138f8-82e7-465a-bf89-a3bfcb357116-->
<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://skyworksinc.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="swks-20241227.xsd#ConsolidatedStatementsofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" 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_e4595ae3-bb0c-4026-84df-ed3a294bca59" 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_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_StatementTable_e4595ae3-bb0c-4026-84df-ed3a294bca59" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_ac56ba9c-dadc-4874-b9bd-d11339c8f302" 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_e4595ae3-bb0c-4026-84df-ed3a294bca59" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_ac56ba9c-dadc-4874-b9bd-d11339c8f302" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_ac56ba9c-dadc-4874-b9bd-d11339c8f302_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_ac56ba9c-dadc-4874-b9bd-d11339c8f302" xlink:to="loc_us-gaap_EquityComponentDomain_ac56ba9c-dadc-4874-b9bd-d11339c8f302_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9607d51b-2bf6-49bf-9f0d-83d4840a767a" 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_ac56ba9c-dadc-4874-b9bd-d11339c8f302" xlink:to="loc_us-gaap_EquityComponentDomain_9607d51b-2bf6-49bf-9f0d-83d4840a767a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_218c60d8-7d86-4128-890d-57216bc6d43b" 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_9607d51b-2bf6-49bf-9f0d-83d4840a767a" xlink:to="loc_us-gaap_CommonStockMember_218c60d8-7d86-4128-890d-57216bc6d43b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_cd8470d4-6065-445b-8c4d-c71cc388d8bc" 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_9607d51b-2bf6-49bf-9f0d-83d4840a767a" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_cd8470d4-6065-445b-8c4d-c71cc388d8bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_c92d0ef3-462c-4ee3-9ebc-a4228c76e721" 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_9607d51b-2bf6-49bf-9f0d-83d4840a767a" xlink:to="loc_us-gaap_RetainedEarningsMember_c92d0ef3-462c-4ee3-9ebc-a4228c76e721" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_10965c0c-5f0c-43b2-ace4-42f908e517fc" 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_9607d51b-2bf6-49bf-9f0d-83d4840a767a" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_10965c0c-5f0c-43b2-ace4-42f908e517fc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_2d02b47d-ee1b-4f09-92d9-fbbb2ade24b4" 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_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_2d02b47d-ee1b-4f09-92d9-fbbb2ade24b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_10a27ee5-5253-4ae5-966d-ab6459c7c4cc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_StockholdersEquity_10a27ee5-5253-4ae5-966d-ab6459c7c4cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_8ee67f25-4aff-4a29-b4a6-ed36c85b2e87" 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_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_NetIncomeLoss_8ee67f25-4aff-4a29-b4a6-ed36c85b2e87" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxesinshares_f639ebf1-a136-4248-a4f7-3d29e134a71a" xlink:href="swks-20241227.xsd#swks_StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxesinshares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_swks_StockIssuedDuringPeriodSharesShareBasedCompensationNetofRelatedTaxesinshares_f639ebf1-a136-4248-a4f7-3d29e134a71a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes_6cec8529-5251-46a9-820e-84c0159ea62d" xlink:href="swks-20241227.xsd#swks_StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_swks_StockIssuedDuringPeriodValueShareBasedCompensationNetofRelatedTaxes_6cec8529-5251-46a9-820e-84c0159ea62d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_8e0169ec-3bf6-46fa-9d7b-5f781491adc8" 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_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_8e0169ec-3bf6-46fa-9d7b-5f781491adc8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_dfe3c0a5-1d9c-4ebb-bf22-bb4f36718604" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_dfe3c0a5-1d9c-4ebb-bf22-bb4f36718604" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_93e29e54-b983-41d9-82d9-72681b8bbf79" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_93e29e54-b983-41d9-82d9-72681b8bbf79" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_b6d8df29-63a6-4924-9077-4c26de2732a2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Dividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_Dividends_b6d8df29-63a6-4924-9077-4c26de2732a2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_ec251250-4c78-427c-8b55-ca441e957b59" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3212f6b3-427d-40d7-a891-21a6c6a5772d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_ec251250-4c78-427c-8b55-ca441e957b59" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_4c58b671-bdc4-474a-ae8f-a70b9934250f" 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_StockholdersEquity_7c71766a-f803-4ccf-b907-1f05f01f71e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/RevenueRecognitionDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#RevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/RevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_b8545018-3834-41e7-b4bf-ffbd510917e7" 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_260f63a3-40b3-4816-8c6d-72e901c500f1" 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_b8545018-3834-41e7-b4bf-ffbd510917e7" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_260f63a3-40b3-4816-8c6d-72e901c500f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_f56bd778-ad00-4460-ae53-ff71009b021d" 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_260f63a3-40b3-4816-8c6d-72e901c500f1" xlink:to="loc_srt_StatementGeographicalAxis_f56bd778-ad00-4460-ae53-ff71009b021d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_f56bd778-ad00-4460-ae53-ff71009b021d_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_f56bd778-ad00-4460-ae53-ff71009b021d" xlink:to="loc_srt_SegmentGeographicalDomain_f56bd778-ad00-4460-ae53-ff71009b021d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_30dde363-5c6e-4aef-bb5f-aded102c9d1e" 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_f56bd778-ad00-4460-ae53-ff71009b021d" xlink:to="loc_srt_SegmentGeographicalDomain_30dde363-5c6e-4aef-bb5f-aded102c9d1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_e75b4206-8fac-44d2-a890-38702dbba34a" 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_30dde363-5c6e-4aef-bb5f-aded102c9d1e" xlink:to="loc_country_US_e75b4206-8fac-44d2-a890-38702dbba34a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_34409d88-a5c7-442f-a753-3f6aad9d174a" 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_30dde363-5c6e-4aef-bb5f-aded102c9d1e" xlink:to="loc_country_CN_34409d88-a5c7-442f-a753-3f6aad9d174a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_TW_2a2e0682-3a76-4949-adb5-7794fc34d7d6" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_TW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_30dde363-5c6e-4aef-bb5f-aded102c9d1e" xlink:to="loc_country_TW_2a2e0682-3a76-4949-adb5-7794fc34d7d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KR_d0005145-df79-483f-a8d0-f0ffb14e931c" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_KR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_30dde363-5c6e-4aef-bb5f-aded102c9d1e" xlink:to="loc_country_KR_d0005145-df79-483f-a8d0-f0ffb14e931c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EMEAMember_80d084ba-79a9-4ad4-8928-3e1c7cd06f75" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EMEAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_30dde363-5c6e-4aef-bb5f-aded102c9d1e" xlink:to="loc_us-gaap_EMEAMember_80d084ba-79a9-4ad4-8928-3e1c7cd06f75" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_AsiaOtherMember_1c721a8b-74ca-4c99-b463-dd7c71d8ceaa" xlink:href="swks-20241227.xsd#swks_AsiaOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_30dde363-5c6e-4aef-bb5f-aded102c9d1e" xlink:to="loc_swks_AsiaOtherMember_1c721a8b-74ca-4c99-b463-dd7c71d8ceaa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_1ca03636-c124-4e50-9189-fdc11851441f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerSalesChannelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_260f63a3-40b3-4816-8c6d-72e901c500f1" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelAxis_1ca03636-c124-4e50-9189-fdc11851441f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_1ca03636-c124-4e50-9189-fdc11851441f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_1ca03636-c124-4e50-9189-fdc11851441f" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_1ca03636-c124-4e50-9189-fdc11851441f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_b10b3d0f-29d0-49d1-bd3d-f5a62c6b8834" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_1ca03636-c124-4e50-9189-fdc11851441f" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_b10b3d0f-29d0-49d1-bd3d-f5a62c6b8834" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesChannelThroughIntermediaryMember_619d9d65-0db8-4a4d-970b-ead159e6b269" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesChannelThroughIntermediaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_b10b3d0f-29d0-49d1-bd3d-f5a62c6b8834" xlink:to="loc_us-gaap_SalesChannelThroughIntermediaryMember_619d9d65-0db8-4a4d-970b-ead159e6b269" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesChannelDirectlyToConsumerMember_6df9ff4d-4ec9-410a-885e-b3944d9e6e7c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SalesChannelDirectlyToConsumerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_b10b3d0f-29d0-49d1-bd3d-f5a62c6b8834" xlink:to="loc_us-gaap_SalesChannelDirectlyToConsumerMember_6df9ff4d-4ec9-410a-885e-b3944d9e6e7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_148dac6a-333d-4e72-b57e-7ee81a4d609a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_b8545018-3834-41e7-b4bf-ffbd510917e7" xlink:to="loc_us-gaap_Revenues_148dac6a-333d-4e72-b57e-7ee81a4d609a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_3baac2a5-10df-4749-8021-d524d69358b4" 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_b8545018-3834-41e7-b4bf-ffbd510917e7" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_3baac2a5-10df-4749-8021-d524d69358b4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/MarketableSecuritiesDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#MarketableSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/MarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_271d880f-604c-4af9-9c41-92155b98f6df" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesTable_ee6a055f-54d1-41f2-9cd9-0310a168a97e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MarketableSecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_271d880f-604c-4af9-9c41-92155b98f6df" xlink:to="loc_us-gaap_MarketableSecuritiesTable_ee6a055f-54d1-41f2-9cd9-0310a168a97e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_b4c00686-a226-4a61-b799-1acf917e0671" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketableSecuritiesTable_ee6a055f-54d1-41f2-9cd9-0310a168a97e" xlink:to="loc_us-gaap_FinancialInstrumentAxis_b4c00686-a226-4a61-b799-1acf917e0671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b4c00686-a226-4a61-b799-1acf917e0671_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_b4c00686-a226-4a61-b799-1acf917e0671" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b4c00686-a226-4a61-b799-1acf917e0671_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fabdebd2-09a1-4569-a514-d6849b60903a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_b4c00686-a226-4a61-b799-1acf917e0671" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fabdebd2-09a1-4569-a514-d6849b60903a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_c2eb90ee-aa47-45c0-9668-af123feef497" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fabdebd2-09a1-4569-a514-d6849b60903a" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_c2eb90ee-aa47-45c0-9668-af123feef497" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_7028ecb6-7956-4207-93b3-ee7e0b97b095" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fabdebd2-09a1-4569-a514-d6849b60903a" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_7028ecb6-7956-4207-93b3-ee7e0b97b095" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_0424d41c-3228-4c9a-a613-67cc271e4032" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fabdebd2-09a1-4569-a514-d6849b60903a" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_0424d41c-3228-4c9a-a613-67cc271e4032" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_a0e3866d-5ef5-4933-8d8b-5900c42f63ba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketableSecuritiesTable_ee6a055f-54d1-41f2-9cd9-0310a168a97e" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_a0e3866d-5ef5-4933-8d8b-5900c42f63ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_a0e3866d-5ef5-4933-8d8b-5900c42f63ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_a0e3866d-5ef5-4933-8d8b-5900c42f63ba" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_a0e3866d-5ef5-4933-8d8b-5900c42f63ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_64b54c40-205e-45df-b11b-8a4d3a1a333e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_a0e3866d-5ef5-4933-8d8b-5900c42f63ba" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_64b54c40-205e-45df-b11b-8a4d3a1a333e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_f527e712-c98a-453d-841c-0c7f824182ba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_64b54c40-205e-45df-b11b-8a4d3a1a333e" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_f527e712-c98a-453d-841c-0c7f824182ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_adba62cd-690a-4795-9887-c607e5949be7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherNoncurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_64b54c40-205e-45df-b11b-8a4d3a1a333e" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_adba62cd-690a-4795-9887-c607e5949be7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_7815ad35-1f61-413e-b2ad-8f579c86958a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_271d880f-604c-4af9-9c41-92155b98f6df" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_7815ad35-1f61-413e-b2ad-8f579c86958a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_78df5c8a-8e2f-4b92-b3ee-5d17f61878cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_271d880f-604c-4af9-9c41-92155b98f6df" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_78df5c8a-8e2f-4b92-b3ee-5d17f61878cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_DebtSecuritiesAvailableforsaleNoncurrentMaximumContractualMaturity_05372fcd-9e73-410d-9903-c8c1fa962ffa" xlink:href="swks-20241227.xsd#swks_DebtSecuritiesAvailableforsaleNoncurrentMaximumContractualMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_271d880f-604c-4af9-9c41-92155b98f6df" xlink:to="loc_swks_DebtSecuritiesAvailableforsaleNoncurrentMaximumContractualMaturity_05372fcd-9e73-410d-9903-c8c1fa962ffa" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/FairValueFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#FairValueFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/FairValueFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ef190f63-8804-4c38-bf01-b4bc77020df9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_8fcba095-f552-43a6-b488-81ac52fb9426" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ef190f63-8804-4c38-bf01-b4bc77020df9" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_8fcba095-f552-43a6-b488-81ac52fb9426" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_601d4753-e9a0-400d-b70e-f0001bc184e6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_8fcba095-f552-43a6-b488-81ac52fb9426" xlink:to="loc_us-gaap_FinancialInstrumentAxis_601d4753-e9a0-400d-b70e-f0001bc184e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_601d4753-e9a0-400d-b70e-f0001bc184e6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_601d4753-e9a0-400d-b70e-f0001bc184e6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_601d4753-e9a0-400d-b70e-f0001bc184e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7cf7b646-3699-44fa-9844-3dea95618509" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_601d4753-e9a0-400d-b70e-f0001bc184e6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7cf7b646-3699-44fa-9844-3dea95618509" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_bdf0c4c4-8c25-4046-9777-96b9ae014f31" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7cf7b646-3699-44fa-9844-3dea95618509" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_bdf0c4c4-8c25-4046-9777-96b9ae014f31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_b7f12389-d405-46b3-a56e-de8c0d2247bb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7cf7b646-3699-44fa-9844-3dea95618509" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_b7f12389-d405-46b3-a56e-de8c0d2247bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_0327b298-4909-404c-9235-3dc7e05a35f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7cf7b646-3699-44fa-9844-3dea95618509" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_0327b298-4909-404c-9235-3dc7e05a35f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_f1ea2b9c-8656-42e3-9f1e-0ac8994f0601" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7cf7b646-3699-44fa-9844-3dea95618509" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_f1ea2b9c-8656-42e3-9f1e-0ac8994f0601" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9ff04f28-436f-42e6-94ff-12ca074d009d" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_8fcba095-f552-43a6-b488-81ac52fb9426" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_9ff04f28-436f-42e6-94ff-12ca074d009d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_9ff04f28-436f-42e6-94ff-12ca074d009d_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_9ff04f28-436f-42e6-94ff-12ca074d009d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_9ff04f28-436f-42e6-94ff-12ca074d009d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_ec0b81ba-340b-4cb7-836d-51a49e85a96c" 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_9ff04f28-436f-42e6-94ff-12ca074d009d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_ec0b81ba-340b-4cb7-836d-51a49e85a96c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_9dcf7e9c-5aca-4f1b-bde3-572fce5a92f0" 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_ec0b81ba-340b-4cb7-836d-51a49e85a96c" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_9dcf7e9c-5aca-4f1b-bde3-572fce5a92f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_063201aa-80eb-4d95-af30-ea3a46b78f2e" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_8fcba095-f552-43a6-b488-81ac52fb9426" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_063201aa-80eb-4d95-af30-ea3a46b78f2e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_063201aa-80eb-4d95-af30-ea3a46b78f2e_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_063201aa-80eb-4d95-af30-ea3a46b78f2e" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_063201aa-80eb-4d95-af30-ea3a46b78f2e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_72fc59fe-d4b8-48a6-9b12-cd3baf134593" 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_063201aa-80eb-4d95-af30-ea3a46b78f2e" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_72fc59fe-d4b8-48a6-9b12-cd3baf134593" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_008b5697-0d77-4661-ab27-34b09ad27195" 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_72fc59fe-d4b8-48a6-9b12-cd3baf134593" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_008b5697-0d77-4661-ab27-34b09ad27195" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_3c0e51b1-8efc-45e8-86f2-3a1c425b8722" 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_72fc59fe-d4b8-48a6-9b12-cd3baf134593" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_3c0e51b1-8efc-45e8-86f2-3a1c425b8722" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_742cdf70-639c-4137-88b3-b7ccaefff503" 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_72fc59fe-d4b8-48a6-9b12-cd3baf134593" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_742cdf70-639c-4137-88b3-b7ccaefff503" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_4274d3b5-fe3a-4ebc-960e-25ae2e2b2745" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ef190f63-8804-4c38-bf01-b4bc77020df9" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_4274d3b5-fe3a-4ebc-960e-25ae2e2b2745" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_f8a91806-13ff-44ac-bcd2-508746099fd1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ef190f63-8804-4c38-bf01-b4bc77020df9" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_f8a91806-13ff-44ac-bcd2-508746099fd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_a4233d68-2422-4e2b-90f0-7885f5d4e42c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ef190f63-8804-4c38-bf01-b4bc77020df9" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_a4233d68-2422-4e2b-90f0-7885f5d4e42c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/FairValueCarryingValuesandEstimatedFairValuesofDebtInstrumentsDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#FairValueCarryingValuesandEstimatedFairValuesofDebtInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/FairValueCarryingValuesandEstimatedFairValuesofDebtInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4b9bb1b3-a9f6-484d-9bac-b1021fca4bff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_5eea9002-9302-488c-9820-d47f2de71cb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4b9bb1b3-a9f6-484d-9bac-b1021fca4bff" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_5eea9002-9302-488c-9820-d47f2de71cb2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_755b29be-7af7-4af7-813b-c83e3bac2610" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_5eea9002-9302-488c-9820-d47f2de71cb2" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_755b29be-7af7-4af7-813b-c83e3bac2610" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_755b29be-7af7-4af7-813b-c83e3bac2610_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_755b29be-7af7-4af7-813b-c83e3bac2610" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_755b29be-7af7-4af7-813b-c83e3bac2610_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_01a2df35-2122-4a06-a426-351f6fa0fd37" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_755b29be-7af7-4af7-813b-c83e3bac2610" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_01a2df35-2122-4a06-a426-351f6fa0fd37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_A2026NotesMember_8a19ac5c-10e3-4081-b036-f2d52da36753" xlink:href="swks-20241227.xsd#swks_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_01a2df35-2122-4a06-a426-351f6fa0fd37" xlink:to="loc_swks_A2026NotesMember_8a19ac5c-10e3-4081-b036-f2d52da36753" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_A2031NotesMember_42488d4b-ec47-4b8f-b617-a3354fc221e6" xlink:href="swks-20241227.xsd#swks_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_01a2df35-2122-4a06-a426-351f6fa0fd37" xlink:to="loc_swks_A2031NotesMember_42488d4b-ec47-4b8f-b617-a3354fc221e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_97d76255-6a27-4126-87ed-4f62ad604213" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_5eea9002-9302-488c-9820-d47f2de71cb2" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_97d76255-6a27-4126-87ed-4f62ad604213" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_97d76255-6a27-4126-87ed-4f62ad604213_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_97d76255-6a27-4126-87ed-4f62ad604213" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_97d76255-6a27-4126-87ed-4f62ad604213_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_e0bc4f07-7d6d-46dd-8149-ab21daba1b56" 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_97d76255-6a27-4126-87ed-4f62ad604213" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_e0bc4f07-7d6d-46dd-8149-ab21daba1b56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_58377741-3f6b-419d-85a9-74b88a354c15" 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_e0bc4f07-7d6d-46dd-8149-ab21daba1b56" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_58377741-3f6b-419d-85a9-74b88a354c15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorLongTermNotes_a8fb1650-9241-4166-b3a8-3195a39cdb53" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SeniorLongTermNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4b9bb1b3-a9f6-484d-9bac-b1021fca4bff" xlink:to="loc_us-gaap_SeniorLongTermNotes_a8fb1650-9241-4166-b3a8-3195a39cdb53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_ef4b631a-4750-4931-9206-1fe40d509223" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4b9bb1b3-a9f6-484d-9bac-b1021fca4bff" xlink:to="loc_us-gaap_LongTermDebtFairValue_ef4b631a-4750-4931-9206-1fe40d509223" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotes_7a21faa8-450c-4752-a31e-b3feea570493" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SeniorNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4b9bb1b3-a9f6-484d-9bac-b1021fca4bff" xlink:to="loc_us-gaap_SeniorNotes_7a21faa8-450c-4752-a31e-b3feea570493" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_0604b936-c50f-49f2-be28-2b403aadf53a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4b9bb1b3-a9f6-484d-9bac-b1021fca4bff" xlink:to="loc_us-gaap_DebtInstrumentFairValue_0604b936-c50f-49f2-be28-2b403aadf53a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/PropertyPlantandEquipmentNetDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#PropertyPlantandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/PropertyPlantandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6549506-72c3-43d3-bf8d-c3b5f7e43620" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_7bd8c142-880f-4393-9f39-32106b4cc295" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6549506-72c3-43d3-bf8d-c3b5f7e43620" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_7bd8c142-880f-4393-9f39-32106b4cc295" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ce2870a5-8a6e-4e57-a0fa-a529f81aed12" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_7bd8c142-880f-4393-9f39-32106b4cc295" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ce2870a5-8a6e-4e57-a0fa-a529f81aed12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ce2870a5-8a6e-4e57-a0fa-a529f81aed12_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ce2870a5-8a6e-4e57-a0fa-a529f81aed12" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ce2870a5-8a6e-4e57-a0fa-a529f81aed12_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8f56ce4d-a709-4d97-947f-27e4188bd5f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ce2870a5-8a6e-4e57-a0fa-a529f81aed12" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8f56ce4d-a709-4d97-947f-27e4188bd5f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAndLandImprovementsMember_c33ea1be-f081-422d-9a25-a0fe757979bd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LandAndLandImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8f56ce4d-a709-4d97-947f-27e4188bd5f7" xlink:to="loc_us-gaap_LandAndLandImprovementsMember_c33ea1be-f081-422d-9a25-a0fe757979bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_289ce523-2eac-443f-b126-3f5671870a76" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8f56ce4d-a709-4d97-947f-27e4188bd5f7" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_289ce523-2eac-443f-b126-3f5671870a76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_dcb20a93-0474-401b-b756-d1c0dc56f669" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8f56ce4d-a709-4d97-947f-27e4188bd5f7" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_dcb20a93-0474-401b-b756-d1c0dc56f669" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_16ac9da0-2750-4935-a432-b613c8fab7f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8f56ce4d-a709-4d97-947f-27e4188bd5f7" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_16ac9da0-2750-4935-a432-b613c8fab7f0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_88df426e-0dd4-42fe-a481-813ccb2145c5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8f56ce4d-a709-4d97-947f-27e4188bd5f7" xlink:to="loc_us-gaap_ConstructionInProgressMember_88df426e-0dd4-42fe-a481-813ccb2145c5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_51a72bd5-556c-42c1-a606-96d6c9322a18" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6549506-72c3-43d3-bf8d-c3b5f7e43620" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_51a72bd5-556c-42c1-a606-96d6c9322a18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_eaf552b4-54a2-44f4-8ebe-4da13cb972fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6549506-72c3-43d3-bf8d-c3b5f7e43620" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_eaf552b4-54a2-44f4-8ebe-4da13cb972fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_71c2ad00-6333-439b-9287-8f4f3818c801" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_f6549506-72c3-43d3-bf8d-c3b5f7e43620" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_71c2ad00-6333-439b-9287-8f4f3818c801" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/GoodwillandIntangibleAssetsDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#GoodwillandIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/GoodwillandIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3f1747dd-3c0e-4b40-bc0c-8fd5fe1f57c7" 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_e4c13da4-ca50-43e1-876c-4befec99b55d" 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_3f1747dd-3c0e-4b40-bc0c-8fd5fe1f57c7" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_e4c13da4-ca50-43e1-876c-4befec99b55d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4ec0f61f-c8f8-4783-b66a-31f0890bb0e3" 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_e4c13da4-ca50-43e1-876c-4befec99b55d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4ec0f61f-c8f8-4783-b66a-31f0890bb0e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4ec0f61f-c8f8-4783-b66a-31f0890bb0e3_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_4ec0f61f-c8f8-4783-b66a-31f0890bb0e3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4ec0f61f-c8f8-4783-b66a-31f0890bb0e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2aca2503-4d1c-4587-9d7c-bc3f593ca5cc" 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_4ec0f61f-c8f8-4783-b66a-31f0890bb0e3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2aca2503-4d1c-4587-9d7c-bc3f593ca5cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InProcessResearchAndDevelopmentMember_40fd7b8a-1dfc-40e4-b04b-f86084efe931" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InProcessResearchAndDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2aca2503-4d1c-4587-9d7c-bc3f593ca5cc" xlink:to="loc_us-gaap_InProcessResearchAndDevelopmentMember_40fd7b8a-1dfc-40e4-b04b-f86084efe931" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_4fbec38a-af87-4a8f-b092-bc44c9113def" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3f1747dd-3c0e-4b40-bc0c-8fd5fe1f57c7" xlink:to="loc_us-gaap_AssetImpairmentCharges_4fbec38a-af87-4a8f-b092-bc44c9113def" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_CompletedAndTransferredInProcessResearchAndDevelopment_fdd0afd6-c535-41c5-b231-5eff32fc6085" xlink:href="swks-20241227.xsd#swks_CompletedAndTransferredInProcessResearchAndDevelopment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3f1747dd-3c0e-4b40-bc0c-8fd5fe1f57c7" xlink:to="loc_swks_CompletedAndTransferredInProcessResearchAndDevelopment_fdd0afd6-c535-41c5-b231-5eff32fc6085" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_52724590-43ff-4fa7-9a38-d4e15b63f91c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3f1747dd-3c0e-4b40-bc0c-8fd5fe1f57c7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_52724590-43ff-4fa7-9a38-d4e15b63f91c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_e9303f37-90d9-4d21-ba70-a609e64028c3" 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_3f1747dd-3c0e-4b40-bc0c-8fd5fe1f57c7" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_e9303f37-90d9-4d21-ba70-a609e64028c3" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/GoodwillandIntangibleAssetsIntangibleAssetsExcludingGoodwillDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#GoodwillandIntangibleAssetsIntangibleAssetsExcludingGoodwillDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/GoodwillandIntangibleAssetsIntangibleAssetsExcludingGoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" 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_0c38826b-5667-48be-aa63-188dbec5de6a" 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_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_0c38826b-5667-48be-aa63-188dbec5de6a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_83ba94d7-6cea-4d6f-ba42-894bb2b26b9a" 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_0c38826b-5667-48be-aa63-188dbec5de6a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_83ba94d7-6cea-4d6f-ba42-894bb2b26b9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_83ba94d7-6cea-4d6f-ba42-894bb2b26b9a_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_83ba94d7-6cea-4d6f-ba42-894bb2b26b9a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_83ba94d7-6cea-4d6f-ba42-894bb2b26b9a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0364a6dd-6fe8-41c5-9ede-625bebbeffba" 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_83ba94d7-6cea-4d6f-ba42-894bb2b26b9a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0364a6dd-6fe8-41c5-9ede-625bebbeffba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_5f0d6760-ec2e-4150-a152-19d66df83a43" 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_0364a6dd-6fe8-41c5-9ede-625bebbeffba" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_5f0d6760-ec2e-4150-a152-19d66df83a43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicensingAgreementsMember_dba6b22c-5186-4599-8cd8-cc9ca534b9e5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LicensingAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0364a6dd-6fe8-41c5-9ede-625bebbeffba" xlink:to="loc_us-gaap_LicensingAgreementsMember_dba6b22c-5186-4599-8cd8-cc9ca534b9e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InProcessResearchAndDevelopmentMember_00da8908-97c2-4328-8c60-e3b888f6416a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InProcessResearchAndDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0364a6dd-6fe8-41c5-9ede-625bebbeffba" xlink:to="loc_us-gaap_InProcessResearchAndDevelopmentMember_00da8908-97c2-4328-8c60-e3b888f6416a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_2c7d522f-4fde-448e-a2d1-3dc94dc21f03" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_2c7d522f-4fde-448e-a2d1-3dc94dc21f03" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_f671697d-3488-44a0-851b-890f3a07d1c8" 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_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_f671697d-3488-44a0-851b-890f3a07d1c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_2ad97b7c-1ce6-44f4-ab66-a4b4f6e34feb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_2ad97b7c-1ce6-44f4-ab66-a4b4f6e34feb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_385ef7e5-c616-4d90-a991-9004999d5219" 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_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_385ef7e5-c616-4d90-a991-9004999d5219" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_37904f57-062a-41ee-a097-a98a8ad61fe1" 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_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_37904f57-062a-41ee-a097-a98a8ad61fe1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_0d20d96a-911a-43f2-955e-7e0a48c45f5f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_0d20d96a-911a-43f2-955e-7e0a48c45f5f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_7cb80d73-b9f0-43ae-bd72-2718fd96d522" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_1525aa92-ae52-48af-8c37-a64c789cdc30" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_7cb80d73-b9f0-43ae-bd72-2718fd96d522" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationLineItems_5bdd7fc9-ab14-4955-ac94-f4d80df65751" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RecordedUnconditionalPurchaseObligationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationTable_2f4b5690-2cbf-4d1c-bed7-672709e9c8e9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RecordedUnconditionalPurchaseObligationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationLineItems_5bdd7fc9-ab14-4955-ac94-f4d80df65751" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationTable_2f4b5690-2cbf-4d1c-bed7-672709e9c8e9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_d460f0f5-0665-49f6-9245-1f51652c9911" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationTable_2f4b5690-2cbf-4d1c-bed7-672709e9c8e9" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_d460f0f5-0665-49f6-9245-1f51652c9911" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationCategoryDomain_d460f0f5-0665-49f6-9245-1f51652c9911_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RecordedUnconditionalPurchaseObligationCategoryDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_d460f0f5-0665-49f6-9245-1f51652c9911" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationCategoryDomain_d460f0f5-0665-49f6-9245-1f51652c9911_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationCategoryDomain_33ceff65-a7ce-415e-b140-25675b311f78" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RecordedUnconditionalPurchaseObligationCategoryDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_d460f0f5-0665-49f6-9245-1f51652c9911" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationCategoryDomain_33ceff65-a7ce-415e-b140-25675b311f78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_WaferPurchasesMember_e78a2ab2-002b-4758-b90f-8ce4172f719e" xlink:href="swks-20241227.xsd#swks_WaferPurchasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationCategoryDomain_33ceff65-a7ce-415e-b140-25675b311f78" xlink:to="loc_swks_WaferPurchasesMember_e78a2ab2-002b-4758-b90f-8ce4172f719e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsAssetsCurrent_ec9178fa-581b-4617-8394-f90ea8349233" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepositsAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationLineItems_5bdd7fc9-ab14-4955-ac94-f4d80df65751" xlink:to="loc_us-gaap_DepositsAssetsCurrent_ec9178fa-581b-4617-8394-f90ea8349233" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_f6517776-805e-4b58-a453-eba3bb440df7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationLineItems_5bdd7fc9-ab14-4955-ac94-f4d80df65751" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_f6517776-805e-4b58-a453-eba3bb440df7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsAssetsNoncurrent_a8b32046-2405-467e-b484-4986e4c34703" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepositsAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationLineItems_5bdd7fc9-ab14-4955-ac94-f4d80df65751" xlink:to="loc_us-gaap_DepositsAssetsNoncurrent_a8b32046-2405-467e-b484-4986e4c34703" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseNoncurrent_5bd5c424-2e39-427a-9aa9-6d572a34a3bb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PrepaidExpenseNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationLineItems_5bdd7fc9-ab14-4955-ac94-f4d80df65751" xlink:to="loc_us-gaap_PrepaidExpenseNoncurrent_5bd5c424-2e39-427a-9aa9-6d572a34a3bb" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/StockholdersEquityStockRepurchaseDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#StockholdersEquityStockRepurchaseDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/StockholdersEquityStockRepurchaseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityClassOfTreasuryStockLineItems_6305f742-a6d3-4396-9b34-e8ec793fcc04" 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_96f53242-e499-47dc-a121-30003be1553a" 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_6305f742-a6d3-4396-9b34-e8ec793fcc04" xlink:to="loc_us-gaap_ClassOfTreasuryStockTable_96f53242-e499-47dc-a121-30003be1553a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_93451c89-1f3c-4bd8-a19d-6375de359db7" 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_ClassOfTreasuryStockTable_96f53242-e499-47dc-a121-30003be1553a" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_93451c89-1f3c-4bd8-a19d-6375de359db7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_93451c89-1f3c-4bd8-a19d-6375de359db7_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_93451c89-1f3c-4bd8-a19d-6375de359db7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_93451c89-1f3c-4bd8-a19d-6375de359db7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_eb9fa74b-d114-47b9-88d4-0056309e30b5" 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_93451c89-1f3c-4bd8-a19d-6375de359db7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_eb9fa74b-d114-47b9-88d4-0056309e30b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_c601f762-f920-4bc6-9c16-1154c3246c60" 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_eb9fa74b-d114-47b9-88d4-0056309e30b5" xlink:to="loc_us-gaap_SubsequentEventMember_c601f762-f920-4bc6-9c16-1154c3246c60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_ebb42736-2731-41ca-b627-b71dd897f9d7" 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_96f53242-e499-47dc-a121-30003be1553a" xlink:to="loc_srt_ShareRepurchaseProgramAxis_ebb42736-2731-41ca-b627-b71dd897f9d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_ebb42736-2731-41ca-b627-b71dd897f9d7_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_ebb42736-2731-41ca-b627-b71dd897f9d7" xlink:to="loc_srt_ShareRepurchaseProgramDomain_ebb42736-2731-41ca-b627-b71dd897f9d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_701f3544-2cc0-4c13-8f2f-5a5323ede351" 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_ebb42736-2731-41ca-b627-b71dd897f9d7" xlink:to="loc_srt_ShareRepurchaseProgramDomain_701f3544-2cc0-4c13-8f2f-5a5323ede351" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_A2023StockRepurchasePlanMember_d1ba63b7-9ac0-4bb1-9d00-863acea1008a" xlink:href="swks-20241227.xsd#swks_A2023StockRepurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_701f3544-2cc0-4c13-8f2f-5a5323ede351" xlink:to="loc_swks_A2023StockRepurchasePlanMember_d1ba63b7-9ac0-4bb1-9d00-863acea1008a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_A2025StockRepurchasePlanMember_c1b36d13-28a2-4c80-aafb-91074cf473fe" xlink:href="swks-20241227.xsd#swks_A2025StockRepurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_701f3544-2cc0-4c13-8f2f-5a5323ede351" xlink:to="loc_swks_A2025StockRepurchasePlanMember_c1b36d13-28a2-4c80-aafb-91074cf473fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_d978980a-27cb-4690-b7ce-afa0931bb4a5" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_6305f742-a6d3-4396-9b34-e8ec793fcc04" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_d978980a-27cb-4690-b7ce-afa0931bb4a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramExpirationDate_40df9525-3580-4cf1-9363-b2a1a424db54" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StockRepurchaseProgramExpirationDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_6305f742-a6d3-4396-9b34-e8ec793fcc04" xlink:to="loc_srt_StockRepurchaseProgramExpirationDate_40df9525-3580-4cf1-9363-b2a1a424db54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredParValueMethod_fe9f9e84-270e-42de-89f2-9afc3e622f35" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValueAcquiredParValueMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_6305f742-a6d3-4396-9b34-e8ec793fcc04" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredParValueMethod_fe9f9e84-270e-42de-89f2-9afc3e622f35" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_dba96683-31d2-4dfd-9ad6-1ff9468bd665" 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_6305f742-a6d3-4396-9b34-e8ec793fcc04" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_dba96683-31d2-4dfd-9ad6-1ff9468bd665" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_5430ce44-7d19-4eb6-a09c-f870a7793635" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_6305f742-a6d3-4396-9b34-e8ec793fcc04" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_5430ce44-7d19-4eb6-a09c-f870a7793635" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_91af48b5-a249-4ce0-b1f9-3e93b2b97845" 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_6305f742-a6d3-4396-9b34-e8ec793fcc04" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_91af48b5-a249-4ce0-b1f9-3e93b2b97845" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/StockholdersEquityDividendsDeclaredDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#StockholdersEquityDividendsDeclaredDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/StockholdersEquityDividendsDeclaredDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsPayableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableTable_06bdf4b3-5dae-4902-a059-01fba6e110df" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsPayableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:to="loc_us-gaap_DividendsPayableTable_06bdf4b3-5dae-4902-a059-01fba6e110df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_b6d34a18-b01a-4874-b09e-292fd16ddf20" 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_DividendsPayableTable_06bdf4b3-5dae-4902-a059-01fba6e110df" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_b6d34a18-b01a-4874-b09e-292fd16ddf20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_b6d34a18-b01a-4874-b09e-292fd16ddf20_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_b6d34a18-b01a-4874-b09e-292fd16ddf20" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_b6d34a18-b01a-4874-b09e-292fd16ddf20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_f4a0f8bf-2612-454b-a9b9-c4ed8f313626" 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_b6d34a18-b01a-4874-b09e-292fd16ddf20" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_f4a0f8bf-2612-454b-a9b9-c4ed8f313626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_5af53a6d-7b67-4093-b37c-2e232fdc4368" 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_f4a0f8bf-2612-454b-a9b9-c4ed8f313626" xlink:to="loc_us-gaap_SubsequentEventMember_5af53a6d-7b67-4093-b37c-2e232fdc4368" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis_92c8f8f6-8abc-48a1-9b5b-699c1a091fe7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DividendsPayableTable_06bdf4b3-5dae-4902-a059-01fba6e110df" xlink:to="loc_us-gaap_DividendsAxis_92c8f8f6-8abc-48a1-9b5b-699c1a091fe7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_92c8f8f6-8abc-48a1-9b5b-699c1a091fe7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_92c8f8f6-8abc-48a1-9b5b-699c1a091fe7" xlink:to="loc_us-gaap_DividendsDomain_92c8f8f6-8abc-48a1-9b5b-699c1a091fe7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_cd1b1012-e117-41fb-9341-ec0e9e06c04a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_92c8f8f6-8abc-48a1-9b5b-699c1a091fe7" xlink:to="loc_us-gaap_DividendsDomain_cd1b1012-e117-41fb-9341-ec0e9e06c04a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendDeclaredMember_17218166-9283-45e5-84d5-62e99465a71d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendDeclaredMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_cd1b1012-e117-41fb-9341-ec0e9e06c04a" xlink:to="loc_us-gaap_DividendDeclaredMember_17218166-9283-45e5-84d5-62e99465a71d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_O2025Q2DividendsMember_eceea984-ce7b-4559-a4b8-7dd455ad9547" xlink:href="swks-20241227.xsd#swks_O2025Q2DividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_cd1b1012-e117-41fb-9341-ec0e9e06c04a" xlink:to="loc_swks_O2025Q2DividendsMember_eceea984-ce7b-4559-a4b8-7dd455ad9547" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_a39d269a-e14d-4c7d-a107-81d88fdc149b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:to="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_a39d269a-e14d-4c7d-a107-81d88fdc149b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableAmountPerShare_d28c137a-f514-4183-9efe-06f745d65126" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsPayableAmountPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:to="loc_us-gaap_DividendsPayableAmountPerShare_d28c137a-f514-4183-9efe-06f745d65126" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_c4733b9a-1e9c-4639-85b7-5b22944bd61f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:to="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_c4733b9a-1e9c-4639-85b7-5b22944bd61f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_94bc7f42-0a3a-4e68-a60b-2f4917e5a311" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:to="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_94bc7f42-0a3a-4e68-a60b-2f4917e5a311" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_e23d1eb0-647d-4141-9e14-ff112b08fae2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_e23d1eb0-647d-4141-9e14-ff112b08fae2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_39dd3845-b843-488d-8fd4-7b3237c6b75e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_98d4d9c9-66ba-4d36-9c37-13ece9adefdc" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_39dd3845-b843-488d-8fd4-7b3237c6b75e" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/StockholdersEquityShareBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#StockholdersEquityShareBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/StockholdersEquityShareBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_7388d49b-5eee-4bec-b8a5-893a958577a4" 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_88fd69af-70cf-4b72-817d-1b7fd490998b" 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_7388d49b-5eee-4bec-b8a5-893a958577a4" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_88fd69af-70cf-4b72-817d-1b7fd490998b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_c6dc4bd4-9e9b-4c6c-b6be-2e9cdfc6ddf6" 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_88fd69af-70cf-4b72-817d-1b7fd490998b" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_c6dc4bd4-9e9b-4c6c-b6be-2e9cdfc6ddf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_c6dc4bd4-9e9b-4c6c-b6be-2e9cdfc6ddf6_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_c6dc4bd4-9e9b-4c6c-b6be-2e9cdfc6ddf6" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_c6dc4bd4-9e9b-4c6c-b6be-2e9cdfc6ddf6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_91f54c5e-7d8d-4a3d-bd82-ab791124cc72" 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_c6dc4bd4-9e9b-4c6c-b6be-2e9cdfc6ddf6" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_91f54c5e-7d8d-4a3d-bd82-ab791124cc72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_9957f362-eb49-4008-8f76-c4f3ab92ba06" 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_91f54c5e-7d8d-4a3d-bd82-ab791124cc72" xlink:to="loc_us-gaap_CostOfSalesMember_9957f362-eb49-4008-8f76-c4f3ab92ba06" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_1181596e-2448-4173-bb81-041ee7ffcf99" 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_91f54c5e-7d8d-4a3d-bd82-ab791124cc72" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_1181596e-2448-4173-bb81-041ee7ffcf99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_7e8f2993-efbd-4d87-aa38-4bf0de6dabc7" 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_91f54c5e-7d8d-4a3d-bd82-ab791124cc72" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_7e8f2993-efbd-4d87-aa38-4bf0de6dabc7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_9f6a3a6e-143c-4189-97ae-8d8b502eef4d" 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_7388d49b-5eee-4bec-b8a5-893a958577a4" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_9f6a3a6e-143c-4189-97ae-8d8b502eef4d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://skyworksinc.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="swks-20241227.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://skyworksinc.com/role/SubsequentEventsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_7ba263ee-8b25-4bbc-bd97-c62bce74ddf8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_b399741d-cf87-4e72-80ca-e4f3eddaa6b9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_7ba263ee-8b25-4bbc-bd97-c62bce74ddf8" xlink:to="loc_us-gaap_SubsequentEventTable_b399741d-cf87-4e72-80ca-e4f3eddaa6b9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_3b3c7dd1-e487-460e-a2ef-80ec2eebaee8" 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_SubsequentEventTable_b399741d-cf87-4e72-80ca-e4f3eddaa6b9" xlink:to="loc_srt_TitleOfIndividualAxis_3b3c7dd1-e487-460e-a2ef-80ec2eebaee8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_3b3c7dd1-e487-460e-a2ef-80ec2eebaee8_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_3b3c7dd1-e487-460e-a2ef-80ec2eebaee8" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_3b3c7dd1-e487-460e-a2ef-80ec2eebaee8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_dde3dabe-5524-4d41-8850-01b9419bf4d4" 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_3b3c7dd1-e487-460e-a2ef-80ec2eebaee8" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_dde3dabe-5524-4d41-8850-01b9419bf4d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_87b13807-1837-4749-8ef2-770d98df0803" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_dde3dabe-5524-4d41-8850-01b9419bf4d4" xlink:to="loc_srt_ChiefExecutiveOfficerMember_87b13807-1837-4749-8ef2-770d98df0803" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_0759d1d4-9c0d-4ebf-9b9c-211ecb6ca451" 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_SubsequentEventTable_b399741d-cf87-4e72-80ca-e4f3eddaa6b9" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_0759d1d4-9c0d-4ebf-9b9c-211ecb6ca451" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_0759d1d4-9c0d-4ebf-9b9c-211ecb6ca451_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_0759d1d4-9c0d-4ebf-9b9c-211ecb6ca451" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_0759d1d4-9c0d-4ebf-9b9c-211ecb6ca451_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_858f0949-1e3c-4a1c-b501-768581bbe0fd" 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_0759d1d4-9c0d-4ebf-9b9c-211ecb6ca451" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_858f0949-1e3c-4a1c-b501-768581bbe0fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_19ae167e-9a40-47e7-ba77-c9aaf127e501" 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_858f0949-1e3c-4a1c-b501-768581bbe0fd" xlink:to="loc_us-gaap_SubsequentEventMember_19ae167e-9a40-47e7-ba77-c9aaf127e501" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateAxis_a3f0a3d3-8d08-4e8c-b7f9-95d52b13cd2f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_b399741d-cf87-4e72-80ca-e4f3eddaa6b9" xlink:to="loc_us-gaap_AwardDateAxis_a3f0a3d3-8d08-4e8c-b7f9-95d52b13cd2f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_a3f0a3d3-8d08-4e8c-b7f9-95d52b13cd2f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardDateAxis_a3f0a3d3-8d08-4e8c-b7f9-95d52b13cd2f" xlink:to="loc_us-gaap_AwardDateDomain_a3f0a3d3-8d08-4e8c-b7f9-95d52b13cd2f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_888a0528-23d2-4b54-8a48-ced6ba566588" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardDateAxis_a3f0a3d3-8d08-4e8c-b7f9-95d52b13cd2f" xlink:to="loc_us-gaap_AwardDateDomain_888a0528-23d2-4b54-8a48-ced6ba566588" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_swks_A2025RestrictedStockMember_df8c4bbf-dd9a-4b17-8b98-d96293224aa2" xlink:href="swks-20241227.xsd#swks_A2025RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_888a0528-23d2-4b54-8a48-ced6ba566588" xlink:to="loc_swks_A2025RestrictedStockMember_df8c4bbf-dd9a-4b17-8b98-d96293224aa2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentBenefitsPeriodExpense_b1b028cc-571f-4f74-a24a-b9d684aa2a65" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PostemploymentBenefitsPeriodExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_7ba263ee-8b25-4bbc-bd97-c62bce74ddf8" xlink:to="loc_us-gaap_PostemploymentBenefitsPeriodExpense_b1b028cc-571f-4f74-a24a-b9d684aa2a65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber_e91c58a4-a528-4085-b0d8-b903cdaf5041" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_7ba263ee-8b25-4bbc-bd97-c62bce74ddf8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAcceleratedVestingNumber_e91c58a4-a528-4085-b0d8-b903cdaf5041" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
