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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e89f4-9ef9-73a4-a936-97d12e89a467,g:73da5064-de51-4c5f-8c0e-fa92516f8259-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.corning.com/role/CoverPage" xlink:type="simple" xlink:href="glw-20260630.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019e89f4-a11d-701d-b0ba-cca2b8c1b211" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_DocumentInformationTable_019e89f4-a11d-701d-b0ba-cca2b8c1b211" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e89f4-a11d-7f03-bfe0-81fc87746d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019e89f4-a11d-701d-b0ba-cca2b8c1b211" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e89f4-a11d-7f03-bfe0-81fc87746d9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e89f4-a11d-7f03-bfe0-81fc87746d9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e89f4-a11d-7f03-bfe0-81fc87746d9c" xlink:to="loc_us-gaap_ClassOfStockDomain_019e89f4-a11d-7f03-bfe0-81fc87746d9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e89f4-a11d-7238-8e64-5524222d43ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e89f4-a11d-7f03-bfe0-81fc87746d9c" xlink:to="loc_us-gaap_ClassOfStockDomain_019e89f4-a11d-7238-8e64-5524222d43ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e89f4-a11d-7b1f-9cd8-a262f609da7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e89f4-a11d-7238-8e64-5524222d43ff" xlink:to="loc_us-gaap_CommonStockMember_019e89f4-a11d-7b1f-9cd8-a262f609da7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_A4.125NotesDue2031Member_019e89f4-a11d-7bd1-98f9-98532277eb82" xlink:href="glw-20260630.xsd#glw_A4.125NotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e89f4-a11d-7238-8e64-5524222d43ff" xlink:to="loc_glw_A4.125NotesDue2031Member_019e89f4-a11d-7bd1-98f9-98532277eb82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e89f4-a11d-77df-bd1a-ffa5caa49b27" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_DocumentType_019e89f4-a11d-77df-bd1a-ffa5caa49b27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e89f4-a11d-763c-b0b1-024062e68d71" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_DocumentQuarterlyReport_019e89f4-a11d-763c-b0b1-024062e68d71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e89f4-a11d-70ca-b4bf-3fd952e1c949" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_DocumentPeriodEndDate_019e89f4-a11d-70ca-b4bf-3fd952e1c949" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e89f4-a11d-7c6b-9d9d-e1359dc310c4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_DocumentTransitionReport_019e89f4-a11d-7c6b-9d9d-e1359dc310c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e89f4-a11d-79be-a804-331d1ff9ae64" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityFileNumber_019e89f4-a11d-79be-a804-331d1ff9ae64" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e89f4-a11d-7001-9007-98228ef22f18" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e89f4-a11d-7001-9007-98228ef22f18" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e89f4-a11d-78e0-8d51-fb0ec225fbd5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e89f4-a11d-78e0-8d51-fb0ec225fbd5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e89f4-a11d-7c96-accf-5c8a85433de6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityAddressAddressLine1_019e89f4-a11d-7c96-accf-5c8a85433de6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e89f4-a11d-7b5c-84d4-e6fe4a48ac59" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityAddressCityOrTown_019e89f4-a11d-7b5c-84d4-e6fe4a48ac59" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e89f4-a11d-77de-8c1c-d75a50586bfa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityAddressStateOrProvince_019e89f4-a11d-77de-8c1c-d75a50586bfa" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e89f4-a11d-7550-9842-19c4fb6ec836" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityAddressPostalZipCode_019e89f4-a11d-7550-9842-19c4fb6ec836" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e89f4-a11d-714b-a90e-7e5578b737bf" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_CityAreaCode_019e89f4-a11d-714b-a90e-7e5578b737bf" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e89f4-a11d-76df-a5d4-2120fda61e5e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_LocalPhoneNumber_019e89f4-a11d-76df-a5d4-2120fda61e5e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e89f4-a11d-7c82-bb5b-671dfc416888" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_Security12bTitle_019e89f4-a11d-7c82-bb5b-671dfc416888" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e89f4-a11d-78a9-9ee8-366c6614d887" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_TradingSymbol_019e89f4-a11d-78a9-9ee8-366c6614d887" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e89f4-a11d-7424-87a2-4b723a5df20b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_SecurityExchangeName_019e89f4-a11d-7424-87a2-4b723a5df20b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e89f4-a11d-76e5-9b79-72ff26042047" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityCurrentReportingStatus_019e89f4-a11d-76e5-9b79-72ff26042047" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e89f4-a11d-7b96-a6ce-f3b9715ff48d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e89f4-a11d-7b96-a6ce-f3b9715ff48d" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e89f4-a11d-7117-ba9c-b0998310db4a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityFilerCategory_019e89f4-a11d-7117-ba9c-b0998310db4a" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e89f4-a11d-73bf-b908-254e220c2549" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntitySmallBusiness_019e89f4-a11d-73bf-b908-254e220c2549" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e89f4-a11d-783f-ae75-5cc2bcc0518b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e89f4-a11d-783f-ae75-5cc2bcc0518b" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e89f4-a11d-7480-b95d-d86dd4c607ea" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityShellCompany_019e89f4-a11d-7480-b95d-d86dd4c607ea" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e89f4-a11d-7173-a896-50ab2a32cf5b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e89f4-a11d-7173-a896-50ab2a32cf5b" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e89f4-a11d-7df9-8dc7-0afba9111b7a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityCentralIndexKey_019e89f4-a11d-7df9-8dc7-0afba9111b7a" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e89f4-a11d-7e94-8b1b-00d7743ec10f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_EntityRegistrantName_019e89f4-a11d-7e94-8b1b-00d7743ec10f" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e89f4-a11d-7804-89cd-9587f46eb45f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e89f4-a11d-7804-89cd-9587f46eb45f" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e89f4-a11d-7e27-ad17-92f997878275" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_AmendmentFlag_019e89f4-a11d-7e27-ad17-92f997878275" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e89f4-a11d-7760-ab94-f18d8b8c623a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_DocumentFiscalYearFocus_019e89f4-a11d-7760-ab94-f18d8b8c623a" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e89f4-a11d-79d9-b82b-ef20196f94ce" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e89f4-a11d-7d15-998c-a61e69a963b9" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e89f4-a11d-79d9-b82b-ef20196f94ce" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="simple" xlink:href="glw-20260630.xsd#ConsolidatedStatementsofChangesinShareholdersEquity"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89f4-a1dc-7367-96f1-56a9bd9ca0c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e89f4-a1dc-7e70-ab77-180365e23fb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e89f4-a1dc-7367-96f1-56a9bd9ca0c7" xlink:to="loc_us-gaap_StatementTable_019e89f4-a1dc-7e70-ab77-180365e23fb2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-799b-bf0b-ecbaf9ca2b8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e89f4-a1dc-7e70-ab77-180365e23fb2" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-799b-bf0b-ecbaf9ca2b8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-799b-bf0b-ecbaf9ca2b8c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-799b-bf0b-ecbaf9ca2b8c" xlink:to="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-799b-bf0b-ecbaf9ca2b8c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7e21-b288-ca14ed15acb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-799b-bf0b-ecbaf9ca2b8c" xlink:to="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7e21-b288-ca14ed15acb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7e21-b288-ca14ed15acb8" xlink:to="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e89f4-a1dc-767d-aac3-1542cec0acf1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:to="loc_us-gaap_CommonStockMember_019e89f4-a1dc-767d-aac3-1542cec0acf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e89f4-a1dc-78cd-8601-7f496ab3b7a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e89f4-a1dc-78cd-8601-7f496ab3b7a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e89f4-a1dc-701f-921f-d21bd6cf8940" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:to="loc_us-gaap_RetainedEarningsMember_019e89f4-a1dc-701f-921f-d21bd6cf8940" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019e89f4-a1dc-7a7a-8888-5232acfc6ca0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019e89f4-a1dc-7a7a-8888-5232acfc6ca0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e89f4-a1dc-78d5-ae8f-e516f9d82a73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e89f4-a1dc-78d5-ae8f-e516f9d82a73" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019e89f4-a1dc-74d2-a2b7-3b3ae6fafc7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f4-a1dc-76ad-931b-25b13c4be5bf" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019e89f4-a1dc-74d2-a2b7-3b3ae6fafc7e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f4-a1dc-7367-96f1-56a9bd9ca0c7" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f4-a1dc-7e59-a85d-22ae6160b5f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f4-a1dc-7e59-a85d-22ae6160b5f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e89f4-a1dc-75af-b3b2-884cb2c71300" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_us-gaap_ProfitLoss_019e89f4-a1dc-75af-b3b2-884cb2c71300" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e89f4-a1dc-723c-bf8e-71aab7c212d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e89f4-a1dc-723c-bf8e-71aab7c212d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019e89f4-a1dc-7d68-8d63-9ef6c726cafb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019e89f4-a1dc-7d68-8d63-9ef6c726cafb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_SharesIssuedToBenefitPlansAndForOptionExercises_019e89f4-a1dc-7313-a5dd-0d5e321e55ca" xlink:href="glw-20260630.xsd#glw_SharesIssuedToBenefitPlansAndForOptionExercises"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_glw_SharesIssuedToBenefitPlansAndForOptionExercises_019e89f4-a1dc-7313-a5dd-0d5e321e55ca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_019f1849-0af0-7579-83f6-f805d9cf16f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_019f1849-0af0-7579-83f6-f805d9cf16f0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_019e89f4-a1dc-7778-aa52-a10970fa858c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_us-gaap_DividendsCommonStockCash_019e89f4-a1dc-7778-aa52-a10970fa858c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOther_019e89f4-a1dc-72ef-b31e-69f4b2d0a35d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f4-a1dc-7c88-a5d8-4c64b157d0e2" xlink:to="loc_us-gaap_StockholdersEquityOther_019e89f4-a1dc-72ef-b31e-69f4b2d0a35d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f4-a1dc-7f6d-9e7a-dd4023a69cdd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/RevenueScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#RevenueScheduleofDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/RevenueScheduleofDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e89f4-a1dc-7fd1-8a0c-146b2bba26ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-70f9-aadf-effeee6d74a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e89f4-a1dc-7fd1-8a0c-146b2bba26ab" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-70f9-aadf-effeee6d74a9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e89f4-a1dc-7f16-a769-54b793117710" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-70f9-aadf-effeee6d74a9" xlink:to="loc_srt_ProductOrServiceAxis_019e89f4-a1dc-7f16-a769-54b793117710" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-7f16-a769-54b793117710_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e89f4-a1dc-7f16-a769-54b793117710" xlink:to="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-7f16-a769-54b793117710_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e89f4-a1dc-7f16-a769-54b793117710" xlink:to="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_OpticalCommunicationsProductsMember_019e89f4-a1dc-7f4f-9aa3-ad6ec16d65a3" xlink:href="glw-20260630.xsd#glw_OpticalCommunicationsProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:to="loc_glw_OpticalCommunicationsProductsMember_019e89f4-a1dc-7f4f-9aa3-ad6ec16d65a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ElectronicsGlassAndAdvancedOpticsProductsMember_019e89f4-a1dc-70c2-88dc-aeb5a929b664" xlink:href="glw-20260630.xsd#glw_ElectronicsGlassAndAdvancedOpticsProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:to="loc_glw_ElectronicsGlassAndAdvancedOpticsProductsMember_019e89f4-a1dc-70c2-88dc-aeb5a929b664" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AutomotiveProductsMember_019e89f4-a1dc-7e53-8749-92a208d21242" xlink:href="glw-20260630.xsd#glw_AutomotiveProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:to="loc_glw_AutomotiveProductsMember_019e89f4-a1dc-7e53-8749-92a208d21242" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_PolycrystallineSiliconAndSolarProductsMember_019e89f4-a1dc-7cb9-9ef6-6044ffad5243" xlink:href="glw-20260630.xsd#glw_PolycrystallineSiliconAndSolarProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:to="loc_glw_PolycrystallineSiliconAndSolarProductsMember_019e89f4-a1dc-7cb9-9ef6-6044ffad5243" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_LifeScienceProductsMember_019e89f4-a1dc-75fa-9e54-93ef9de8f3cc" xlink:href="glw-20260630.xsd#glw_LifeScienceProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:to="loc_glw_LifeScienceProductsMember_019e89f4-a1dc-75fa-9e54-93ef9de8f3cc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_019e89f4-a1dc-7385-9833-2ade2417d028" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e89f4-a1dc-76ab-bd75-a9a9c1228c2a" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_019e89f4-a1dc-7385-9833-2ade2417d028" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e89f4-a1dc-7ab0-88b0-765aa7b3e020" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e89f4-a1dc-7fd1-8a0c-146b2bba26ab" xlink:to="loc_us-gaap_Revenues_019e89f4-a1dc-7ab0-88b0-765aa7b3e020" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/RevenueNarrativeDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#RevenueNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/RevenueNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-7b13-bbc1-0005af011265" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-7b13-bbc1-0005af011265" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019f4a91-fba1-73d9-b1e6-e438f923c4a2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-7b13-bbc1-0005af011265" xlink:to="loc_srt_RangeAxis_019f4a91-fba1-73d9-b1e6-e438f923c4a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f4a91-fba1-73d9-b1e6-e438f923c4a2_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019f4a91-fba1-73d9-b1e6-e438f923c4a2" xlink:to="loc_srt_RangeMember_019f4a91-fba1-73d9-b1e6-e438f923c4a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f4a91-fba1-74c3-bd05-ceb31fb2300c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019f4a91-fba1-73d9-b1e6-e438f923c4a2" xlink:to="loc_srt_RangeMember_019f4a91-fba1-74c3-bd05-ceb31fb2300c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019f4a91-fba1-78ef-90ae-cac589f61cd7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f4a91-fba1-74c3-bd05-ceb31fb2300c" xlink:to="loc_srt_MaximumMember_019f4a91-fba1-78ef-90ae-cac589f61cd7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationAxis_019f8b20-9c73-7ce0-9ec4-274d1421c0ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerDurationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-7b13-bbc1-0005af011265" xlink:to="loc_us-gaap_ContractWithCustomerDurationAxis_019f8b20-9c73-7ce0-9ec4-274d1421c0ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain_019f8b20-9c73-7ce0-9ec4-274d1421c0ec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerDurationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerDurationAxis_019f8b20-9c73-7ce0-9ec4-274d1421c0ec" xlink:to="loc_us-gaap_ContractWithCustomerDurationDomain_019f8b20-9c73-7ce0-9ec4-274d1421c0ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain_019f8b20-9c73-7d49-99cc-a2852818bc92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerDurationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerDurationAxis_019f8b20-9c73-7ce0-9ec4-274d1421c0ec" xlink:to="loc_us-gaap_ContractWithCustomerDurationDomain_019f8b20-9c73-7d49-99cc-a2852818bc92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermContractWithCustomerMember_019f8b20-d985-7d68-98fb-48391ebbca19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerDurationDomain_019f8b20-9c73-7d49-99cc-a2852818bc92" xlink:to="loc_us-gaap_LongTermContractWithCustomerMember_019f8b20-d985-7d68-98fb-48391ebbca19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019f8b50-cc98-71c7-988a-7c0b7f890935" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e89f4-a1dc-7b13-bbc1-0005af011265" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019f8b50-cc98-71c7-988a-7c0b7f890935" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019f8b50-cc98-71c7-988a-7c0b7f890935_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019f8b50-cc98-71c7-988a-7c0b7f890935" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019f8b50-cc98-71c7-988a-7c0b7f890935_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019f8b50-cc98-723f-adac-ee3085350f26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019f8b50-cc98-71c7-988a-7c0b7f890935" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019f8b50-cc98-723f-adac-ee3085350f26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_TraditionalWarrantMember_019f8b50-cc98-7126-b050-fa30f699d8ef" xlink:href="glw-20260630.xsd#glw_TraditionalWarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019f8b50-cc98-723f-adac-ee3085350f26" xlink:to="loc_glw_TraditionalWarrantMember_019f8b50-cc98-7126-b050-fa30f699d8ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_019f4a91-d216-7692-8a78-4a4fb08359eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:to="loc_us-gaap_ContractWithCustomerLiability_019f4a91-d216-7692-8a78-4a4fb08359eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_LongTermSupplyCommitmentPeriod_019f4a91-fba1-723a-bf98-761c2b725560" xlink:href="glw-20260630.xsd#glw_LongTermSupplyCommitmentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:to="loc_glw_LongTermSupplyCommitmentPeriod_019f4a91-fba1-723a-bf98-761c2b725560" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDepositsFromCustomers_019f6af3-70b1-72b5-b3d8-6f1ec4e61ab8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromDepositsFromCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:to="loc_us-gaap_ProceedsFromDepositsFromCustomers_019f6af3-70b1-72b5-b3d8-6f1ec4e61ab8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_019f4a91-71c9-7db3-9f62-1fc65bfc5c51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:to="loc_us-gaap_ContractWithCustomerAssetNet_019f4a91-71c9-7db3-9f62-1fc65bfc5c51" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ContractLiabilityBalanceToCustomerReceivables_019f4a91-fba1-7466-b74f-9bf3e37212c3" xlink:href="glw-20260630.xsd#glw_ContractLiabilityBalanceToCustomerReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:to="loc_glw_ContractLiabilityBalanceToCustomerReceivables_019f4a91-fba1-7466-b74f-9bf3e37212c3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019f4a92-1f29-7dff-b47d-d3a889783820" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f4a91-71c9-74e9-ba7f-c30290c1be48" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019f4a92-1f29-7dff-b47d-d3a889783820" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/LeasesDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#LeasesDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/LeasesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019eac9e-ad9a-76b5-9c22-801fdd23e920" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019eac9e-ad9a-76b5-9c22-801fdd23e920" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019eac9e-ad9a-780d-a1b3-98a21e708af5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019eac9e-ad9a-76b5-9c22-801fdd23e920" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019eac9e-ad9a-780d-a1b3-98a21e708af5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019eac9e-ad9a-780d-a1b3-98a21e708af5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019eac9e-ad9a-780d-a1b3-98a21e708af5" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019eac9e-ad9a-780d-a1b3-98a21e708af5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019eac9e-ad9a-76a6-bf47-4abe79784cbc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019eac9e-ad9a-780d-a1b3-98a21e708af5" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019eac9e-ad9a-76a6-bf47-4abe79784cbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingLeaseLeaseNotYetCommencedMember_019eac9e-ad9a-77f6-8013-a3f2179b097d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingLeaseLeaseNotYetCommencedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019eac9e-ad9a-76a6-bf47-4abe79784cbc" xlink:to="loc_us-gaap_FinancingLeaseLeaseNotYetCommencedMember_019eac9e-ad9a-77f6-8013-a3f2179b097d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019eac9e-ad9a-7d4b-ae75-70dc11e9bc59" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019eac9e-ad9a-76b5-9c22-801fdd23e920" xlink:to="loc_srt_RangeAxis_019eac9e-ad9a-7d4b-ae75-70dc11e9bc59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eac9e-ad9a-7d4b-ae75-70dc11e9bc59_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019eac9e-ad9a-7d4b-ae75-70dc11e9bc59" xlink:to="loc_srt_RangeMember_019eac9e-ad9a-7d4b-ae75-70dc11e9bc59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eac9e-ad9a-7ebe-a601-31596f78fb68" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019eac9e-ad9a-7d4b-ae75-70dc11e9bc59" xlink:to="loc_srt_RangeMember_019eac9e-ad9a-7ebe-a601-31596f78fb68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019eac9e-ad9a-7610-a9f2-b28f6cb64fa6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eac9e-ad9a-7ebe-a601-31596f78fb68" xlink:to="loc_srt_MinimumMember_019eac9e-ad9a-7610-a9f2-b28f6cb64fa6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019eac9e-ad9a-7805-b4e3-ce733ee7349c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eac9e-ad9a-7ebe-a601-31596f78fb68" xlink:to="loc_srt_MaximumMember_019eac9e-ad9a-7805-b4e3-ce733ee7349c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeAxis_019eac9e-ad9a-78e6-b954-b4e25096ea6c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GovernmentAssistanceTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019eac9e-ad9a-76b5-9c22-801fdd23e920" xlink:to="loc_us-gaap_GovernmentAssistanceTypeAxis_019eac9e-ad9a-78e6-b954-b4e25096ea6c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_019eac9e-ad9a-78e6-b954-b4e25096ea6c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GovernmentAssistanceTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_019eac9e-ad9a-78e6-b954-b4e25096ea6c" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_019eac9e-ad9a-78e6-b954-b4e25096ea6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_019eac9e-ad9a-7718-84d2-f75e8c4987b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GovernmentAssistanceTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_019eac9e-ad9a-78e6-b954-b4e25096ea6c" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_019eac9e-ad9a-7718-84d2-f75e8c4987b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_GovernmentIncentives48DCreditsMember_019eac9e-ad9a-7ee6-8055-772e94702a17" xlink:href="glw-20260630.xsd#glw_GovernmentIncentives48DCreditsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_019eac9e-ad9a-7718-84d2-f75e8c4987b0" xlink:to="loc_glw_GovernmentIncentives48DCreditsMember_019eac9e-ad9a-7ee6-8055-772e94702a17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_019f1fb0-8591-747b-837e-7565dec56ce7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019eac9e-ad9a-76b5-9c22-801fdd23e920" xlink:to="loc_us-gaap_LeaseContractualTermAxis_019f1fb0-8591-747b-837e-7565dec56ce7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_019f1fb0-8591-747b-837e-7565dec56ce7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_019f1fb0-8591-747b-837e-7565dec56ce7" xlink:to="loc_us-gaap_LeaseContractualTermDomain_019f1fb0-8591-747b-837e-7565dec56ce7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_019f1fb0-8591-7b12-a29e-ae0109ff9740" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_019f1fb0-8591-747b-837e-7565dec56ce7" xlink:to="loc_us-gaap_LeaseContractualTermDomain_019f1fb0-8591-7b12-a29e-ae0109ff9740" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_EquipmentLeasesCommenced2026Member_019f1fb0-f6a4-70d0-9bd8-44d022327f8f" xlink:href="glw-20260630.xsd#glw_EquipmentLeasesCommenced2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_019f1fb0-8591-7b12-a29e-ae0109ff9740" xlink:to="loc_glw_EquipmentLeasesCommenced2026Member_019f1fb0-f6a4-70d0-9bd8-44d022327f8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019eac9e-ad9a-768e-88e3-50eb1e779a17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019eac9e-ad9a-768e-88e3-50eb1e779a17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_019eac9e-ad9a-7d64-b3ab-6e99792c49fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_019eac9e-ad9a-7d64-b3ab-6e99792c49fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeaseTermOfContract1_019eac9e-ad9a-771b-85fa-a03dd010fefc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeFinanceLeaseTermOfContract1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:to="loc_us-gaap_LesseeFinanceLeaseTermOfContract1_019eac9e-ad9a-771b-85fa-a03dd010fefc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_FinanceLeaseSection48DTaxIncentive_019eac9e-ad9a-78e2-862a-5867c71d8e6b" xlink:href="glw-20260630.xsd#glw_FinanceLeaseSection48DTaxIncentive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:to="loc_glw_FinanceLeaseSection48DTaxIncentive_019eac9e-ad9a-78e2-862a-5867c71d8e6b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019eac9e-ad9a-7267-abc8-8b2687595138" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019eac9e-ad9a-7267-abc8-8b2687595138" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeaseLeaseNotYetCommencedTermOfContract1_019eac9e-ad9a-703a-bfee-4b5e3e723afc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeFinanceLeaseLeaseNotYetCommencedTermOfContract1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019eac9e-ad9a-7187-8116-963819703c1a" xlink:to="loc_us-gaap_LesseeFinanceLeaseLeaseNotYetCommencedTermOfContract1_019eac9e-ad9a-703a-bfee-4b5e3e723afc" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/DebtDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#DebtDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/DebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eacc9-7415-7e79-9dfb-756bdd517d8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eacc9-7415-7e79-9dfb-756bdd517d8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eacc9-7415-7e79-9dfb-756bdd517d8d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eacc9-7415-7e79-9dfb-756bdd517d8d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eacc9-7415-7e79-9dfb-756bdd517d8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eacc9-7415-7b4b-b15d-01aabd7c99ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eacc9-7415-7e79-9dfb-756bdd517d8d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eacc9-7415-7b4b-b15d-01aabd7c99ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019eacc9-7415-777f-9e8e-801f19a16d08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eacc9-7415-7b4b-b15d-01aabd7c99ab" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019eacc9-7415-777f-9e8e-801f19a16d08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019eacc9-933a-7406-8160-b548f7e71856" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:to="loc_us-gaap_CreditFacilityAxis_019eacc9-933a-7406-8160-b548f7e71856" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019eacc9-933a-7406-8160-b548f7e71856_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019eacc9-933a-7406-8160-b548f7e71856" xlink:to="loc_us-gaap_CreditFacilityDomain_019eacc9-933a-7406-8160-b548f7e71856_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019eacc9-933a-76ec-8b9c-65e1f743be82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019eacc9-933a-7406-8160-b548f7e71856" xlink:to="loc_us-gaap_CreditFacilityDomain_019eacc9-933a-76ec-8b9c-65e1f743be82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019eacc9-933a-72a6-be3b-eabbd967bf6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019eacc9-933a-76ec-8b9c-65e1f743be82" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019eacc9-933a-72a6-be3b-eabbd967bf6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019eacc9-b8a1-71de-9a0c-6534eee93016" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:to="loc_us-gaap_DebtInstrumentAxis_019eacc9-b8a1-71de-9a0c-6534eee93016" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-71de-9a0c-6534eee93016_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eacc9-b8a1-71de-9a0c-6534eee93016" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-71de-9a0c-6534eee93016_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-7a07-86aa-cae92fcec2c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eacc9-b8a1-71de-9a0c-6534eee93016" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-7a07-86aa-cae92fcec2c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_UnsecuredVariableRateLoanFacilitiesMember_019f6d37-3cee-7ae6-b120-180da5429b2c" xlink:href="glw-20260630.xsd#glw_UnsecuredVariableRateLoanFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-7a07-86aa-cae92fcec2c5" xlink:to="loc_glw_UnsecuredVariableRateLoanFacilitiesMember_019f6d37-3cee-7ae6-b120-180da5429b2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_UnsecuredVariableRateLoanFacilitiesQTDQ22026Member_019f6d38-5833-7c68-906e-3db4f9a86026" xlink:href="glw-20260630.xsd#glw_UnsecuredVariableRateLoanFacilitiesQTDQ22026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_UnsecuredVariableRateLoanFacilitiesMember_019f6d37-3cee-7ae6-b120-180da5429b2c" xlink:to="loc_glw_UnsecuredVariableRateLoanFacilitiesQTDQ22026Member_019f6d38-5833-7c68-906e-3db4f9a86026" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_UnsecuredVariableRateLoanFacilitiesYTDQ22026Member_019f6d38-c06d-7c95-a06f-b5d312fdce6f" xlink:href="glw-20260630.xsd#glw_UnsecuredVariableRateLoanFacilitiesYTDQ22026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_UnsecuredVariableRateLoanFacilitiesMember_019f6d37-3cee-7ae6-b120-180da5429b2c" xlink:to="loc_glw_UnsecuredVariableRateLoanFacilitiesYTDQ22026Member_019f6d38-c06d-7c95-a06f-b5d312fdce6f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_A2026NotesMember_019eacc9-ddc4-7047-9aeb-0f1d701b0b1e" xlink:href="glw-20260630.xsd#glw_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-7a07-86aa-cae92fcec2c5" xlink:to="loc_glw_A2026NotesMember_019eacc9-ddc4-7047-9aeb-0f1d701b0b1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_A2025NotesMember_019eacc9-ddc4-7d6b-b871-f595a1efe4c7" xlink:href="glw-20260630.xsd#glw_A2025NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-7a07-86aa-cae92fcec2c5" xlink:to="loc_glw_A2025NotesMember_019eacc9-ddc4-7d6b-b871-f595a1efe4c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_Debentures7.25Due2036Member_019f8b46-32b0-7f3e-a9eb-7f01dd8e224b" xlink:href="glw-20260630.xsd#glw_Debentures7.25Due2036Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eacc9-b8a1-7a07-86aa-cae92fcec2c5" xlink:to="loc_glw_Debentures7.25Due2036Member_019f8b46-32b0-7f3e-a9eb-7f01dd8e224b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019eacc9-b8a1-7b77-a541-e2af4419ba95" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:to="loc_srt_RangeAxis_019eacc9-b8a1-7b77-a541-e2af4419ba95" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eacc9-b8a1-7b77-a541-e2af4419ba95_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019eacc9-b8a1-7b77-a541-e2af4419ba95" xlink:to="loc_srt_RangeMember_019eacc9-b8a1-7b77-a541-e2af4419ba95_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019eacc9-b8a1-7509-bd37-57124d41c61a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019eacc9-b8a1-7b77-a541-e2af4419ba95" xlink:to="loc_srt_RangeMember_019eacc9-b8a1-7509-bd37-57124d41c61a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019eacc9-b8a1-74b9-b8e7-7587313d9990" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eacc9-b8a1-7509-bd37-57124d41c61a" xlink:to="loc_srt_MinimumMember_019eacc9-b8a1-74b9-b8e7-7587313d9990" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019eacc9-b8a1-782f-9a98-682903853ba7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019eacc9-b8a1-7509-bd37-57124d41c61a" xlink:to="loc_srt_MaximumMember_019eacc9-b8a1-782f-9a98-682903853ba7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019f8b48-cd88-7e6c-b828-78fdbfc39215" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019f8b48-cd88-7e6c-b828-78fdbfc39215" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019f8b48-cd88-7e6c-b828-78fdbfc39215_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019f8b48-cd88-7e6c-b828-78fdbfc39215" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019f8b48-cd88-7e6c-b828-78fdbfc39215_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019f8b48-cd88-799f-ab88-3efcbba6e5d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019f8b48-cd88-7e6c-b828-78fdbfc39215" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019f8b48-cd88-799f-ab88-3efcbba6e5d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019f8b48-e1ed-7c3a-b0fa-b250de1a4f2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019f8b48-cd88-799f-ab88-3efcbba6e5d2" xlink:to="loc_us-gaap_SubsequentEventMember_019f8b48-e1ed-7c3a-b0fa-b250de1a4f2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019f8b49-708d-7675-88cb-aca1ecb8b67e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e89f4-a1dc-7196-87ba-5828b86e585f" xlink:to="loc_srt_StatementScenarioAxis_019f8b49-708d-7675-88cb-aca1ecb8b67e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019f8b49-708d-7675-88cb-aca1ecb8b67e_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019f8b49-708d-7675-88cb-aca1ecb8b67e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019f8b49-708d-7675-88cb-aca1ecb8b67e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019f8b49-708d-7511-a7e5-283ce356c1de" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019f8b49-708d-7675-88cb-aca1ecb8b67e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019f8b49-708d-7511-a7e5-283ce356c1de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019f8b49-8421-75bf-9d63-1489175e1cba" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019f8b49-708d-7511-a7e5-283ce356c1de" xlink:to="loc_srt_ScenarioForecastMember_019f8b49-8421-75bf-9d63-1489175e1cba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019eacc9-7415-7bfc-857b-4a1cd47da9b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_LongTermDebtFairValue_019eacc9-7415-7bfc-857b-4a1cd47da9b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019eacc9-7415-73a8-aa99-1aef65235206" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019eacc9-7415-73a8-aa99-1aef65235206" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019eacc9-933a-78e3-9b54-025811ff80a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019eacc9-933a-78e3-9b54-025811ff80a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019eacc9-933a-745e-98e0-bb82302936e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_ShortTermBorrowings_019eacc9-933a-745e-98e0-bb82302936e7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepaidPrincipal_019eacc9-ddc4-7c5c-ad0e-a47c0e2d7ba1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRepaidPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_DebtInstrumentRepaidPrincipal_019eacc9-ddc4-7c5c-ad0e-a47c0e2d7ba1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019eacc9-b8a1-79e8-bf6a-4ffd7174c6db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019eacc9-b8a1-79e8-bf6a-4ffd7174c6db" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditCurrent_019eacc9-b8a1-7a51-9180-2a8205900c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LinesOfCreditCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_LinesOfCreditCurrent_019eacc9-b8a1-7a51-9180-2a8205900c2c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019eacc9-b8a1-7fd3-86cf-8713b45afc19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019eacc9-b8a1-7fd3-86cf-8713b45afc19" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_019f6d33-cc13-7cf6-9777-51cda0484adb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_019f6d33-cc13-7cf6-9777-51cda0484adb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019eacc9-b8a1-7f18-9d6b-2e34037c7988" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_LineOfCredit_019eacc9-b8a1-7f18-9d6b-2e34037c7988" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019f8b46-b494-765f-b51d-4ba7ccd74b73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_LongTermDebt_019f8b46-b494-765f-b51d-4ba7ccd74b73" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019f8b48-742c-7bde-a4f6-84684b02f7ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eacc9-7415-7458-ad6d-7d07bb53ce25" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019f8b48-742c-7bde-a4f6-84684b02f7ee" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/EmployeeRetirementPlansDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#EmployeeRetirementPlansDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/EmployeeRetirementPlansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f4-a1dc-7de7-a140-76a1651cfc3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f4-a1dc-7de7-a140-76a1651cfc3a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019e89f4-a1dc-7272-925f-17ec9eaffdf2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f4-a1dc-7de7-a140-76a1651cfc3a" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019e89f4-a1dc-7272-925f-17ec9eaffdf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f4-a1dc-7272-925f-17ec9eaffdf2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f4-a1dc-7272-925f-17ec9eaffdf2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f4-a1dc-7272-925f-17ec9eaffdf2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f4-a1dc-79ca-a428-3d93a997a75c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f4-a1dc-7272-925f-17ec9eaffdf2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f4-a1dc-79ca-a428-3d93a997a75c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019e89f4-a1dc-7c69-81bc-d7cc5b0113ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e89f4-a1dc-79ca-a428-3d93a997a75c" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019e89f4-a1dc-7c69-81bc-d7cc5b0113ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019e89f4-a1dc-7c0d-8233-f8416086064d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e89f4-a1dc-79ca-a428-3d93a997a75c" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019e89f4-a1dc-7c0d-8233-f8416086064d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_019e89f4-a1dc-7f3b-b0ad-3cd3de7fb3d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_019e89f4-a1dc-7f3b-b0ad-3cd3de7fb3d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019e89f4-a1dc-7a38-a36d-5f52ec2e62ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019e89f4-a1dc-7a38-a36d-5f52ec2e62ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e89f4-a1dc-7fe4-97ed-434b79293a13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e89f4-a1dc-7fe4-97ed-434b79293a13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e89f4-a1dc-71a2-831d-105608a88d89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e89f4-a1dc-71a2-831d-105608a88d89" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019e89f4-a1dc-7a62-ba85-9c0876a0fdfc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019e89f4-a1dc-7a62-ba85-9c0876a0fdfc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_019f184d-da02-7b92-a7cf-63cca58e32ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_019f184d-da02-7b92-a7cf-63cca58e32ab" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e89f4-a1dc-7a52-8c53-8f0c2e8dcc7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f4-a1dc-7fea-af92-e7e53ec48382" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e89f4-a1dc-7a52-8c53-8f0c2e8dcc7b" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_019e89f4-a1dc-761b-8daf-3a7141ef34ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_019e89f4-a1dc-74e0-9f33-f1c8c1d12c6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019e89f4-a1dc-761b-8daf-3a7141ef34ca" xlink:to="loc_us-gaap_OtherCommitmentsTable_019e89f4-a1dc-74e0-9f33-f1c8c1d12c6e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e89f4-a1dc-7aa7-9949-0c7b0731517b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019e89f4-a1dc-74e0-9f33-f1c8c1d12c6e" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e89f4-a1dc-7aa7-9949-0c7b0731517b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e89f4-a1dc-7aa7-9949-0c7b0731517b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationContingencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e89f4-a1dc-7aa7-9949-0c7b0731517b" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e89f4-a1dc-7aa7-9949-0c7b0731517b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e89f4-a1dc-7100-a76d-bbad19d98e9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationContingencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e89f4-a1dc-7aa7-9949-0c7b0731517b" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e89f4-a1dc-7100-a76d-bbad19d98e9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_EnvironmentalClaimsMember_019e89f4-a1dc-7337-b4d8-b8ea86c8c247" xlink:href="glw-20260630.xsd#glw_EnvironmentalClaimsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e89f4-a1dc-7100-a76d-bbad19d98e9b" xlink:to="loc_glw_EnvironmentalClaimsMember_019e89f4-a1dc-7337-b4d8-b8ea86c8c247" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NumberOfHazardousWasteSites_019e89f4-a1dc-7028-966a-f2fa789ff224" xlink:href="glw-20260630.xsd#glw_NumberOfHazardousWasteSites"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019e89f4-a1dc-761b-8daf-3a7141ef34ca" xlink:to="loc_glw_NumberOfHazardousWasteSites_019e89f4-a1dc-7028-966a-f2fa789ff224" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingencies_019e89f4-a1dc-7a05-8915-63555bd38d53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccrualForEnvironmentalLossContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019e89f4-a1dc-761b-8daf-3a7141ef34ca" xlink:to="loc_us-gaap_AccrualForEnvironmentalLossContingencies_019e89f4-a1dc-7a05-8915-63555bd38d53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag_019e89f4-a1dc-7266-9411-f9b2cb98c526" xlink:href="glw-20260630.xsd#glw_EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019e89f4-a1dc-761b-8daf-3a7141ef34ca" xlink:to="loc_glw_EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag_019e89f4-a1dc-7266-9411-f9b2cb98c526" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/FinancialInstrumentsScheduleofNotionalAmountsandRespectiveFairValuesofDerivativeFinancialInstrumentsonaGrossBasisDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#FinancialInstrumentsScheduleofNotionalAmountsandRespectiveFairValuesofDerivativeFinancialInstrumentsonaGrossBasisDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/FinancialInstrumentsScheduleofNotionalAmountsandRespectiveFairValuesofDerivativeFinancialInstrumentsonaGrossBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7f16-94d6-a4f0105b585b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7f16-94d6-a4f0105b585b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-76d6-aba2-2fcd4522c1d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-76d6-aba2-2fcd4522c1d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_TranslatedEarningsContractsMember_019e89f4-a1dc-7ecc-ab48-f5f86b5b0f90" xlink:href="glw-20260630.xsd#glw_TranslatedEarningsContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_glw_TranslatedEarningsContractsMember_019e89f4-a1dc-7ecc-ab48-f5f86b5b0f90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_019e89f4-a1dc-7818-a2f4-afbf729a952b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_us-gaap_CurrencySwapMember_019e89f4-a1dc-7818-a2f4-afbf729a952b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019e89f4-a1dc-79d9-af17-db4e191f1e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019e89f4-a1dc-79d9-af17-db4e191f1e9d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_LeasePreciousMetalsMember_019e89f4-a1dc-7c13-8839-2930a1861791" xlink:href="glw-20260630.xsd#glw_LeasePreciousMetalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_glw_LeasePreciousMetalsMember_019e89f4-a1dc-7c13-8839-2930a1861791" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7775-9ee6-6a6b3e570336_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7775-9ee6-6a6b3e570336_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89f4-a1dc-7876-8a83-9f5c43142567" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89f4-a1dc-7876-8a83-9f5c43142567" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7eac-a433-2d9786a4e6e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:to="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7eac-a433-2d9786a4e6e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e89f4-a1dc-7c04-8d15-d8d204b1f5a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e89f4-a1dc-7c04-8d15-d8d204b1f5a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_CashFlowAndNetInvestmentHedgingMember_019e89f4-a1dc-777b-b45d-7a98531bf488" xlink:href="glw-20260630.xsd#glw_CashFlowAndNetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:to="loc_glw_CashFlowAndNetInvestmentHedgingMember_019e89f4-a1dc-777b-b45d-7a98531bf488" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019e89f4-a1dc-7d8f-84f2-93815faff830" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_CashFlowAndNetInvestmentHedgingMember_019e89f4-a1dc-777b-b45d-7a98531bf488" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019e89f4-a1dc-7d8f-84f2-93815faff830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_019e89f4-a1dc-77b4-aeaf-2b6b15947a70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:to="loc_us-gaap_FairValueHedgingMember_019e89f4-a1dc-77b4-aeaf-2b6b15947a70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e89f4-a1dc-7a9a-b07b-55ca56fae9d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e89f4-a1dc-7a9a-b07b-55ca56fae9d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89f4-a1dc-77e4-b20b-37d8c550da3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89f4-a1dc-77e4-b20b-37d8c550da3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89f4-a1dc-7a14-b44d-9e30720f1503" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89f4-a1dc-7a14-b44d-9e30720f1503" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_019e89f4-a1dc-78bc-b63c-c054f7a14d93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_019e89f4-a1dc-78bc-b63c-c054f7a14d93" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_019e89f4-a1dc-78ce-9591-e9937fced80e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_019e89f4-a1dc-78ce-9591-e9937fced80e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e89f4-a1dc-7feb-8d35-ad441f9d738a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeAssets_019e89f4-a1dc-7feb-8d35-ad441f9d738a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_019e89f4-a1dc-76d6-b5b0-51d04b5d4ffe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_019e89f4-a1dc-76d6-b5b0-51d04b5d4ffe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e89f4-a1dc-72e1-a29f-28f408efaf69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e89f4-a1dc-72e1-a29f-28f408efaf69" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e89f4-a1dc-7455-b092-fe77e6c1d410" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilities_019e89f4-a1dc-7455-b092-fe77e6c1d410" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffsetNotionalAmount_019e89f4-a1dc-7378-8172-afe31e7c8c07" xlink:href="glw-20260630.xsd#glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffsetNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffsetNotionalAmount_019e89f4-a1dc-7378-8172-afe31e7c8c07" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffset_019e89f4-a1dc-78ef-9228-1ea1d9e0267b" xlink:href="glw-20260630.xsd#glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffset_019e89f4-a1dc-78ef-9228-1ea1d9e0267b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_019e89f4-a1dc-7a1f-80d4-4055f968f4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountMass"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_019e89f4-a1dc-7a1f-80d4-4055f968f4bd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount_019e89f4-a1dc-71a7-b708-e2ad9ecbe99a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilityNotionalAmount_019e89f4-a1dc-71a7-b708-e2ad9ecbe99a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_DeferredPayments_019e89f4-a1dc-7e32-927a-a6a31e6d6ecd" xlink:href="glw-20260630.xsd#glw_DeferredPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_glw_DeferredPayments_019e89f4-a1dc-7e32-927a-a6a31e6d6ecd" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/FinancialInstrumentsScheduleofNotionalAmountsandRespectiveFairValuesofDerivativeFinancialInstrumentsonaGrossBasisDetails_1" xlink:type="simple" xlink:href="glw-20260630.xsd#FinancialInstrumentsScheduleofNotionalAmountsandRespectiveFairValuesofDerivativeFinancialInstrumentsonaGrossBasisDetails_1"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/FinancialInstrumentsScheduleofNotionalAmountsandRespectiveFairValuesofDerivativeFinancialInstrumentsonaGrossBasisDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7f16-94d6-a4f0105b585b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7f16-94d6-a4f0105b585b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7f16-94d6-a4f0105b585b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-76d6-aba2-2fcd4522c1d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-76d6-aba2-2fcd4522c1d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_TranslatedEarningsContractsMember_019e89f4-a1dc-7ecc-ab48-f5f86b5b0f90" xlink:href="glw-20260630.xsd#glw_TranslatedEarningsContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_glw_TranslatedEarningsContractsMember_019e89f4-a1dc-7ecc-ab48-f5f86b5b0f90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_019e89f4-a1dc-7818-a2f4-afbf729a952b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_us-gaap_CurrencySwapMember_019e89f4-a1dc-7818-a2f4-afbf729a952b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019e89f4-a1dc-79d9-af17-db4e191f1e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019e89f4-a1dc-79d9-af17-db4e191f1e9d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_LeasePreciousMetalsMember_019e89f4-a1dc-7c13-8839-2930a1861791" xlink:href="glw-20260630.xsd#glw_LeasePreciousMetalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7162-98c1-4fba324ed1ff" xlink:to="loc_glw_LeasePreciousMetalsMember_019e89f4-a1dc-7c13-8839-2930a1861791" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7775-9ee6-6a6b3e570336_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7775-9ee6-6a6b3e570336_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7775-9ee6-6a6b3e570336" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89f4-a1dc-7876-8a83-9f5c43142567" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e89f4-a1dc-7876-8a83-9f5c43142567" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7eac-a433-2d9786a4e6e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7320-85c2-79e5621fa669" xlink:to="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7eac-a433-2d9786a4e6e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-737d-9480-e832f7e622fc" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70e6-9f45-2d4b8e327a9a" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_CashFlowAndNetInvestmentHedgingMember_019e89f4-a1dc-777b-b45d-7a98531bf488" xlink:href="glw-20260630.xsd#glw_CashFlowAndNetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:to="loc_glw_CashFlowAndNetInvestmentHedgingMember_019e89f4-a1dc-777b-b45d-7a98531bf488" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019e89f4-a1dc-7d8f-84f2-93815faff830" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_CashFlowAndNetInvestmentHedgingMember_019e89f4-a1dc-777b-b45d-7a98531bf488" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019e89f4-a1dc-7d8f-84f2-93815faff830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_019e89f4-a1dc-77b4-aeaf-2b6b15947a70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7bef-8d59-fbeef4879eca" xlink:to="loc_us-gaap_FairValueHedgingMember_019e89f4-a1dc-77b4-aeaf-2b6b15947a70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e89f4-a1dc-7a9a-b07b-55ca56fae9d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e89f4-a1dc-7a9a-b07b-55ca56fae9d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89f4-a1dc-77e4-b20b-37d8c550da3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e89f4-a1dc-77e4-b20b-37d8c550da3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89f4-a1dc-7a14-b44d-9e30720f1503" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e89f4-a1dc-7a14-b44d-9e30720f1503" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_019e89f4-a1dc-78bc-b63c-c054f7a14d93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_019e89f4-a1dc-78bc-b63c-c054f7a14d93" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_019e89f4-a1dc-78ce-9591-e9937fced80e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_019e89f4-a1dc-78ce-9591-e9937fced80e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e89f4-a1dc-7feb-8d35-ad441f9d738a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeAssets_019e89f4-a1dc-7feb-8d35-ad441f9d738a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_019e89f4-a1dc-76d6-b5b0-51d04b5d4ffe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_019e89f4-a1dc-76d6-b5b0-51d04b5d4ffe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e89f4-a1dc-72e1-a29f-28f408efaf69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e89f4-a1dc-72e1-a29f-28f408efaf69" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e89f4-a1dc-7455-b092-fe77e6c1d410" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilities_019e89f4-a1dc-7455-b092-fe77e6c1d410" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffsetNotionalAmount_019e89f4-a1dc-7378-8172-afe31e7c8c07" xlink:href="glw-20260630.xsd#glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffsetNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffsetNotionalAmount_019e89f4-a1dc-7378-8172-afe31e7c8c07" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffset_019e89f4-a1dc-78ef-9228-1ea1d9e0267b" xlink:href="glw-20260630.xsd#glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_glw_NonderivativeSubjectToMasterNettingArrangementBeforeOffset_019e89f4-a1dc-78ef-9228-1ea1d9e0267b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_019e89f4-a1dc-7a1f-80d4-4055f968f4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountMass"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_019e89f4-a1dc-7a1f-80d4-4055f968f4bd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount_019e89f4-a1dc-71a7-b708-e2ad9ecbe99a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_us-gaap_DerivativeLiabilityNotionalAmount_019e89f4-a1dc-71a7-b708-e2ad9ecbe99a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_DeferredPayments_019e89f4-a1dc-7e32-927a-a6a31e6d6ecd" xlink:href="glw-20260630.xsd#glw_DeferredPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-742a-8815-b01bb22e1adf" xlink:to="loc_glw_DeferredPayments_019e89f4-a1dc-7e32-927a-a6a31e6d6ecd" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/FinancialInstrumentsScheduleofTotalGrossNotionalValueforTranslatedEarningsContractsDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#FinancialInstrumentsScheduleofTotalGrossNotionalValueforTranslatedEarningsContractsDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/FinancialInstrumentsScheduleofTotalGrossNotionalValueforTranslatedEarningsContractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-786c-b107-2d746f61cb25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-751c-bfd7-303e2e12e3fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-786c-b107-2d746f61cb25" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-751c-bfd7-303e2e12e3fe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7114-8b03-20e9515f1454" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-751c-bfd7-303e2e12e3fe" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7114-8b03-20e9515f1454" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7114-8b03-20e9515f1454_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7114-8b03-20e9515f1454" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7114-8b03-20e9515f1454_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-71e8-bee7-620d223f0746" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7114-8b03-20e9515f1454" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-71e8-bee7-620d223f0746" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7d9b-890b-a9445b980f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-71e8-bee7-620d223f0746" xlink:to="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7d9b-890b-a9445b980f0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7612-a19e-008b38da4a7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-751c-bfd7-303e2e12e3fe" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7612-a19e-008b38da4a7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7612-a19e-008b38da4a7c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7612-a19e-008b38da4a7c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7612-a19e-008b38da4a7c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7612-a19e-008b38da4a7c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageRateForwardContractsJapaneseYenDenominatedMember_019e89f4-a1dc-76b7-bf01-390f50eb2239" xlink:href="glw-20260630.xsd#glw_AverageRateForwardContractsJapaneseYenDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:to="loc_glw_AverageRateForwardContractsJapaneseYenDenominatedMember_019e89f4-a1dc-76b7-bf01-390f50eb2239" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageRateForwardContractsMexicanPesoDenominatedMember_019e89f4-a1dc-72b5-88bf-22411165806f" xlink:href="glw-20260630.xsd#glw_AverageRateForwardContractsMexicanPesoDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:to="loc_glw_AverageRateForwardContractsMexicanPesoDenominatedMember_019e89f4-a1dc-72b5-88bf-22411165806f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageRateForwardContractsChineseYuandenominationMember_019e89f4-a1dc-7c86-85ae-d43ba066fe99" xlink:href="glw-20260630.xsd#glw_AverageRateForwardContractsChineseYuandenominationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:to="loc_glw_AverageRateForwardContractsChineseYuandenominationMember_019e89f4-a1dc-7c86-85ae-d43ba066fe99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageRateForwardContractsSouthKoreanWonDenominatedMember_019e89f4-a1dc-7481-ad84-d2766e062abc" xlink:href="glw-20260630.xsd#glw_AverageRateForwardContractsSouthKoreanWonDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:to="loc_glw_AverageRateForwardContractsSouthKoreanWonDenominatedMember_019e89f4-a1dc-7481-ad84-d2766e062abc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageRateForwardContractsEuroDenominatedMember_019e89f4-a1dc-7af9-9531-f48948f417f1" xlink:href="glw-20260630.xsd#glw_AverageRateForwardContractsEuroDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:to="loc_glw_AverageRateForwardContractsEuroDenominatedMember_019e89f4-a1dc-7af9-9531-f48948f417f1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageRateForwardContractsNewTaiwanDollarDenominatedMember_019e89f4-a1dc-79f9-91a5-47b2bf559e29" xlink:href="glw-20260630.xsd#glw_AverageRateForwardContractsNewTaiwanDollarDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:to="loc_glw_AverageRateForwardContractsNewTaiwanDollarDenominatedMember_019e89f4-a1dc-79f9-91a5-47b2bf559e29" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_OptionsContractsJapaneseYenDenominatedMember_019e89f4-a1dc-7c00-b55e-2116926ed288" xlink:href="glw-20260630.xsd#glw_OptionsContractsJapaneseYenDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-75ec-a8be-c97d756334c2" xlink:to="loc_glw_OptionsContractsJapaneseYenDenominatedMember_019e89f4-a1dc-7c00-b55e-2116926ed288" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e89f4-a1dc-7dac-ac3f-503cdd6cc830" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-786c-b107-2d746f61cb25" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e89f4-a1dc-7dac-ac3f-503cdd6cc830" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/FinancialInstrumentsScheduleofEffectofDesignatedDerivativeFinancialInstrumentsonConsolidatedFinancialStatementsDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#FinancialInstrumentsScheduleofEffectofDesignatedDerivativeFinancialInstrumentsonConsolidatedFinancialStatementsDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/FinancialInstrumentsScheduleofEffectofDesignatedDerivativeFinancialInstrumentsonConsolidatedFinancialStatementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7fc1-9111-2d1ecfcb41e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7c84-afb9-1ffa841b34a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7fc1-9111-2d1ecfcb41e3" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7c84-afb9-1ffa841b34a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-78a3-b424-8ce6dd0af73c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7c84-afb9-1ffa841b34a5" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-78a3-b424-8ce6dd0af73c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-78a3-b424-8ce6dd0af73c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-78a3-b424-8ce6dd0af73c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-78a3-b424-8ce6dd0af73c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-709b-9afd-ee03142e4279" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-78a3-b424-8ce6dd0af73c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-709b-9afd-ee03142e4279" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-7082-8871-32d9b5dff3ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-709b-9afd-ee03142e4279" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-7082-8871-32d9b5dff3ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019e89f4-a1dc-70da-a9da-f8f778cf73e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7c84-afb9-1ffa841b34a5" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019e89f4-a1dc-70da-a9da-f8f778cf73e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019e89f4-a1dc-70da-a9da-f8f778cf73e1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019e89f4-a1dc-70da-a9da-f8f778cf73e1" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019e89f4-a1dc-70da-a9da-f8f778cf73e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019e89f4-a1dc-79a1-8ff5-8ed8e4992c04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_019e89f4-a1dc-70da-a9da-f8f778cf73e1" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019e89f4-a1dc-79a1-8ff5-8ed8e4992c04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_019e89f4-a1dc-7e5c-8188-117692d2858d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_019e89f4-a1dc-79a1-8ff5-8ed8e4992c04" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_019e89f4-a1dc-7e5c-8188-117692d2858d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70fa-a5b9-90ad7b44a5c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7c84-afb9-1ffa841b34a5" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70fa-a5b9-90ad7b44a5c8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-70fa-a5b9-90ad7b44a5c8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70fa-a5b9-90ad7b44a5c8" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-70fa-a5b9-90ad7b44a5c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7ccb-a8c7-2475605aa316" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e89f4-a1dc-70fa-a5b9-90ad7b44a5c8" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7ccb-a8c7-2475605aa316" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019e89f4-a1dc-762a-a09d-ca34107cc391" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e89f4-a1dc-7ccb-a8c7-2475605aa316" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019e89f4-a1dc-762a-a09d-ca34107cc391" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e89f4-a1dc-70ff-8c29-934854a34a1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7fc1-9111-2d1ecfcb41e3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e89f4-a1dc-70ff-8c29-934854a34a1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019e89f4-a1dc-70f0-a2d7-5150318e84f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7fc1-9111-2d1ecfcb41e3" xlink:to="loc_us-gaap_CostOfRevenue_019e89f4-a1dc-70f0-a2d7-5150318e84f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e89f4-a1dc-73f4-a713-e4a50e7da999" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7fc1-9111-2d1ecfcb41e3" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e89f4-a1dc-73f4-a713-e4a50e7da999" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e89f4-a1dc-7429-bacc-dc4f0c66937d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7fc1-9111-2d1ecfcb41e3" xlink:to="loc_us-gaap_NetIncomeLoss_019e89f4-a1dc-7429-bacc-dc4f0c66937d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019e89f4-a1dc-7666-8415-3a02d08cf895" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7fc1-9111-2d1ecfcb41e3" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019e89f4-a1dc-7666-8415-3a02d08cf895" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/FinancialInstrumentsScheduleofEffectofUndesignatedDerivativeFinancialInstrumentsonConsolidatedFinancialStatementsDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#FinancialInstrumentsScheduleofEffectofUndesignatedDerivativeFinancialInstrumentsonConsolidatedFinancialStatementsDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/FinancialInstrumentsScheduleofEffectofUndesignatedDerivativeFinancialInstrumentsonConsolidatedFinancialStatementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7e8e-ba7b-8c050871c4ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7f13-afc6-9fb16119d60b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7e8e-ba7b-8c050871c4ec" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7f13-afc6-9fb16119d60b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7e07-b9ab-6be217f70b47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7f13-afc6-9fb16119d60b" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7e07-b9ab-6be217f70b47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7e07-b9ab-6be217f70b47_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7e07-b9ab-6be217f70b47" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7e07-b9ab-6be217f70b47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7cae-8d72-1acd4b2f0761" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e89f4-a1dc-7e07-b9ab-6be217f70b47" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7cae-8d72-1acd4b2f0761" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7cd1-b147-cbbee861f8f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e89f4-a1dc-7cae-8d72-1acd4b2f0761" xlink:to="loc_us-gaap_NondesignatedMember_019e89f4-a1dc-7cd1-b147-cbbee861f8f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7beb-8aba-fd9b28e1a3fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e89f4-a1dc-7f13-afc6-9fb16119d60b" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7beb-8aba-fd9b28e1a3fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7beb-8aba-fd9b28e1a3fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7beb-8aba-fd9b28e1a3fa" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-7beb-8aba-fd9b28e1a3fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-76f2-b58e-b3ca49040059" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e89f4-a1dc-7beb-8aba-fd9b28e1a3fa" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-76f2-b58e-b3ca49040059" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-7f26-9ce6-a930ae1c7090" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-76f2-b58e-b3ca49040059" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e89f4-a1dc-7f26-9ce6-a930ae1c7090" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_TranslatedEarningsContractsMember_019e89f4-a1dc-76d8-a6bb-1f257afc2c64" xlink:href="glw-20260630.xsd#glw_TranslatedEarningsContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-76f2-b58e-b3ca49040059" xlink:to="loc_glw_TranslatedEarningsContractsMember_019e89f4-a1dc-76d8-a6bb-1f257afc2c64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_019e89f4-a1dc-7d11-93f5-71b9f401e13e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e89f4-a1dc-76f2-b58e-b3ca49040059" xlink:to="loc_us-gaap_CurrencySwapMember_019e89f4-a1dc-7d11-93f5-71b9f401e13e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e89f4-a1dc-711c-b945-a6e5f648c7da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7e8e-ba7b-8c050871c4ec" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e89f4-a1dc-711c-b945-a6e5f648c7da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_DerivativeGainLossOnDerivativeNonCashPreTaxRealizedLoss_019e89f4-a1dc-7114-90b7-f552ef1f41f8" xlink:href="glw-20260630.xsd#glw_DerivativeGainLossOnDerivativeNonCashPreTaxRealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e89f4-a1dc-7e8e-ba7b-8c050871c4ec" xlink:to="loc_glw_DerivativeGainLossOnDerivativeNonCashPreTaxRealizedLoss_019e89f4-a1dc-7114-90b7-f552ef1f41f8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/IncomeTaxesNarrativeDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#IncomeTaxesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019e89f4-a1dc-7d39-93c3-771548651008" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019e89f4-a1dc-72a8-87a5-7d4a67141901" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019e89f4-a1dc-7d39-93c3-771548651008" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019e89f4-a1dc-72a8-87a5-7d4a67141901" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_019e89f4-a1dc-7566-a650-82706d577cbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019e89f4-a1dc-72a8-87a5-7d4a67141901" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_019e89f4-a1dc-7566-a650-82706d577cbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_019e89f4-a1dc-7566-a650-82706d577cbf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_019e89f4-a1dc-7566-a650-82706d577cbf" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_019e89f4-a1dc-7566-a650-82706d577cbf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_019e89f4-a1dc-704c-8bc1-5f004bb7544a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_019e89f4-a1dc-7566-a650-82706d577cbf" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_019e89f4-a1dc-704c-8bc1-5f004bb7544a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NationalTaxServiceOfKoreaMember_019e89f4-a1dc-711e-9ebf-a20371b33230" xlink:href="glw-20260630.xsd#glw_NationalTaxServiceOfKoreaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_019e89f4-a1dc-704c-8bc1-5f004bb7544a" xlink:to="loc_glw_NationalTaxServiceOfKoreaMember_019e89f4-a1dc-711e-9ebf-a20371b33230" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019e89f4-a1dc-7006-8125-7d9896bb0dac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019e89f4-a1dc-7d39-93c3-771548651008" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019e89f4-a1dc-7006-8125-7d9896bb0dac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_IncomeTaxesReceivableWriteOff_019e89f4-a1dc-72b3-a3c3-363dbe403baf" xlink:href="glw-20260630.xsd#glw_IncomeTaxesReceivableWriteOff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019e89f4-a1dc-7d39-93c3-771548651008" xlink:to="loc_glw_IncomeTaxesReceivableWriteOff_019e89f4-a1dc-72b3-a3c3-363dbe403baf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesReceivableNoncurrent_019e89f4-a1dc-7683-8a10-3753485256e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesReceivableNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019e89f4-a1dc-7d39-93c3-771548651008" xlink:to="loc_us-gaap_IncomeTaxesReceivableNoncurrent_019e89f4-a1dc-7683-8a10-3753485256e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_019e89f4-a1dc-7a19-b5e5-afdad2f86073" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019e89f4-a1dc-7d39-93c3-771548651008" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_019e89f4-a1dc-7a19-b5e5-afdad2f86073" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ShareholdersEquityNarrativeDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ShareholdersEquityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ShareholdersEquityNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramTable_019e89f4-a1dc-76cd-8039-37e69fbefd51" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_srt_ShareRepurchaseProgramTable_019e89f4-a1dc-76cd-8039-37e69fbefd51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis_019ead32-180e-7c99-ad6c-c19ede06aeaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ShareRepurchaseProgramTable_019e89f4-a1dc-76cd-8039-37e69fbefd51" xlink:to="loc_us-gaap_DividendsAxis_019ead32-180e-7c99-ad6c-c19ede06aeaf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_019ead32-180e-7c99-ad6c-c19ede06aeaf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_019ead32-180e-7c99-ad6c-c19ede06aeaf" xlink:to="loc_us-gaap_DividendsDomain_019ead32-180e-7c99-ad6c-c19ede06aeaf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_019ead32-180e-7816-98cf-7d01964e282f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_019ead32-180e-7c99-ad6c-c19ede06aeaf" xlink:to="loc_us-gaap_DividendsDomain_019ead32-180e-7816-98cf-7d01964e282f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_O2026Q1DividendsMember_019ead32-180e-7794-ae1e-755289eb3a3d" xlink:href="glw-20260630.xsd#glw_O2026Q1DividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_019ead32-180e-7816-98cf-7d01964e282f" xlink:to="loc_glw_O2026Q1DividendsMember_019ead32-180e-7794-ae1e-755289eb3a3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_O2026Q2DividendsMember_019ead32-180e-7471-a762-55c8c00c0d37" xlink:href="glw-20260630.xsd#glw_O2026Q2DividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_019ead32-180e-7816-98cf-7d01964e282f" xlink:to="loc_glw_O2026Q2DividendsMember_019ead32-180e-7471-a762-55c8c00c0d37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_O2026Q3DividendsMember_019ead32-180e-7649-a0d9-97a1f2622547" xlink:href="glw-20260630.xsd#glw_O2026Q3DividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_019ead32-180e-7816-98cf-7d01964e282f" xlink:to="loc_glw_O2026Q3DividendsMember_019ead32-180e-7649-a0d9-97a1f2622547" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_019ead33-fcf9-7416-ba3e-f6fd5ab240ce" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ShareRepurchaseProgramTable_019e89f4-a1dc-76cd-8039-37e69fbefd51" xlink:to="loc_srt_ShareRepurchaseProgramAxis_019ead33-fcf9-7416-ba3e-f6fd5ab240ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019ead33-fcf9-7416-ba3e-f6fd5ab240ce_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019ead33-fcf9-7416-ba3e-f6fd5ab240ce" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019ead33-fcf9-7416-ba3e-f6fd5ab240ce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019ead33-fcf9-7a12-80a8-52ed42657a9a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019ead33-fcf9-7416-ba3e-f6fd5ab240ce" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019ead33-fcf9-7a12-80a8-52ed42657a9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_The2019RepurchaseProgramMember_019ead33-fcf9-77b7-9c63-a0e6be1a4f89" xlink:href="glw-20260630.xsd#glw_The2019RepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_019ead33-fcf9-7a12-80a8-52ed42657a9a" xlink:to="loc_glw_The2019RepurchaseProgramMember_019ead33-fcf9-77b7-9c63-a0e6be1a4f89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019ead34-2921-7313-9358-a9e4c7a458fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ShareRepurchaseProgramTable_019e89f4-a1dc-76cd-8039-37e69fbefd51" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019ead34-2921-7313-9358-a9e4c7a458fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019ead34-2921-7313-9358-a9e4c7a458fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019ead34-2921-7313-9358-a9e4c7a458fa" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019ead34-2921-7313-9358-a9e4c7a458fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019ead34-2921-7f5c-88e4-9ac293c7f21e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019ead34-2921-7313-9358-a9e4c7a458fa" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019ead34-2921-7f5c-88e4-9ac293c7f21e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019ead34-2921-7381-a07e-9a3370e59524" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019ead34-2921-7f5c-88e4-9ac293c7f21e" xlink:to="loc_us-gaap_WarrantMember_019ead34-2921-7381-a07e-9a3370e59524" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_PreFundedWarrantMember_019ead34-2921-7157-8ab1-ba2e147e0533" xlink:href="glw-20260630.xsd#glw_PreFundedWarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019ead34-2921-7f5c-88e4-9ac293c7f21e" xlink:to="loc_glw_PreFundedWarrantMember_019ead34-2921-7157-8ab1-ba2e147e0533" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_TraditionalWarrantMember_019f46ad-a063-782d-b218-49262d396752" xlink:href="glw-20260630.xsd#glw_TraditionalWarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019ead34-2921-7f5c-88e4-9ac293c7f21e" xlink:to="loc_glw_TraditionalWarrantMember_019f46ad-a063-782d-b218-49262d396752" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019ead34-2921-7b0a-af24-b1f319da142d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ShareRepurchaseProgramTable_019e89f4-a1dc-76cd-8039-37e69fbefd51" xlink:to="loc_srt_CounterpartyNameAxis_019ead34-2921-7b0a-af24-b1f319da142d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019ead34-2921-7b0a-af24-b1f319da142d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019ead34-2921-7b0a-af24-b1f319da142d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019ead34-2921-7b0a-af24-b1f319da142d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019ead34-2921-70f5-9a0f-bc745e3ceac0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019ead34-2921-7b0a-af24-b1f319da142d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019ead34-2921-70f5-9a0f-bc745e3ceac0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NVIDIAMember_019ead34-2921-76af-904c-3956e62c56db" xlink:href="glw-20260630.xsd#glw_NVIDIAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019ead34-2921-70f5-9a0f-bc745e3ceac0" xlink:to="loc_glw_NVIDIAMember_019ead34-2921-76af-904c-3956e62c56db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionTypeAxis_019ead34-2921-70af-909a-fc6677eafa50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransactionTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ShareRepurchaseProgramTable_019e89f4-a1dc-76cd-8039-37e69fbefd51" xlink:to="loc_us-gaap_TransactionTypeAxis_019ead34-2921-70af-909a-fc6677eafa50" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionDomain_019ead34-2921-70af-909a-fc6677eafa50_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TransactionTypeAxis_019ead34-2921-70af-909a-fc6677eafa50" xlink:to="loc_us-gaap_TransactionDomain_019ead34-2921-70af-909a-fc6677eafa50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransactionDomain_019ead34-2921-7230-b05c-c7e41f9d0dc7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TransactionTypeAxis_019ead34-2921-70af-909a-fc6677eafa50" xlink:to="loc_us-gaap_TransactionDomain_019ead34-2921-7230-b05c-c7e41f9d0dc7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_PurchaseAgreementMember_019ead34-2921-70b4-b56a-8dd7f3b21f79" xlink:href="glw-20260630.xsd#glw_PurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransactionDomain_019ead34-2921-7230-b05c-c7e41f9d0dc7" xlink:to="loc_glw_PurchaseAgreementMember_019ead34-2921-70b4-b56a-8dd7f3b21f79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_019ead32-180e-769b-9eda-cd5b81c45591" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_019ead32-180e-769b-9eda-cd5b81c45591" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019ead33-fcf9-7b2a-b6ef-9354dd1e01c5" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019ead33-fcf9-7b2a-b6ef-9354dd1e01c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019ead33-fcf9-7b93-9488-d8d3e385b0cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019ead33-fcf9-7b93-9488-d8d3e385b0cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019ead33-fcf9-7aab-90c6-8f334511bbaa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019ead33-fcf9-7aab-90c6-8f334511bbaa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019ead33-fcf9-7cfc-8ded-bdbb46658218" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019ead33-fcf9-7cfc-8ded-bdbb46658218" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_019ead34-2921-78ee-afff-4494120a1067" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_019ead34-2921-78ee-afff-4494120a1067" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019ead34-2921-7866-9139-afb750338bcb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019ead34-2921-7866-9139-afb750338bcb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_019f46ad-a063-7fc1-9a2c-f0189e993569" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_ContractWithCustomerAssetNet_019f46ad-a063-7fc1-9a2c-f0189e993569" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019ead34-2921-70f7-9e85-3bc2247e67af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramLineItems_019ead32-180e-738f-9817-049bcb0d82d1" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019ead34-2921-70f7-9e85-3bc2247e67af" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ShareholdersEquityScheduleofChangesinForeignCurrencyTranslationAdjustmentComponentofAccumulatedOtherComprehensiveLossDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ShareholdersEquityScheduleofChangesinForeignCurrencyTranslationAdjustmentComponentofAccumulatedOtherComprehensiveLossDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ShareholdersEquityScheduleofChangesinForeignCurrencyTranslationAdjustmentComponentofAccumulatedOtherComprehensiveLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019e89f4-a1dc-71b8-8907-ead7e6810a3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019e89f4-a1dc-7e6f-b750-6ba54a728c08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019e89f4-a1dc-71b8-8907-ead7e6810a3b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019e89f4-a1dc-7e6f-b750-6ba54a728c08" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-7adb-9620-29df10a1c3f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019e89f4-a1dc-7e6f-b750-6ba54a728c08" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-7adb-9620-29df10a1c3f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7adb-9620-29df10a1c3f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-7adb-9620-29df10a1c3f8" xlink:to="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7adb-9620-29df10a1c3f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7442-bd6e-1a0ccec96a6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e89f4-a1dc-7adb-9620-29df10a1c3f8" xlink:to="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7442-bd6e-1a0ccec96a6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019e89f4-a1dc-78aa-a90f-5e7a44a6412c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e89f4-a1dc-7442-bd6e-1a0ccec96a6d" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019e89f4-a1dc-78aa-a90f-5e7a44a6412c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e89f4-a1dc-758b-8477-c0e337ebdadb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019e89f4-a1dc-71b8-8907-ead7e6810a3b" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e89f4-a1dc-758b-8477-c0e337ebdadb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f4-a1dc-7b40-a54c-3865ef1736f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e89f4-a1dc-758b-8477-c0e337ebdadb" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f4-a1dc-7b40-a54c-3865ef1736f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_019e89f4-a1dc-7103-b735-4b5acb821f21" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e89f4-a1dc-758b-8477-c0e337ebdadb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_019e89f4-a1dc-7103-b735-4b5acb821f21" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciEquityMethodInvestmentAfterTax_019e89f4-a1dc-71d2-a5c7-2ad48ebf7184" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OciEquityMethodInvestmentAfterTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e89f4-a1dc-758b-8477-c0e337ebdadb" xlink:to="loc_us-gaap_OciEquityMethodInvestmentAfterTax_019e89f4-a1dc-71d2-a5c7-2ad48ebf7184" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e89f4-a1dc-7a83-a278-89afe702ae35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e89f4-a1dc-758b-8477-c0e337ebdadb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e89f4-a1dc-7a83-a278-89afe702ae35" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f4-a1dc-7de5-91e5-ef2f96f7e026" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/EarningsPerCommonShareDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#EarningsPerCommonShareDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/EarningsPerCommonShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019e89f4-a1dc-7530-8b7e-53068d07272f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019e89f4-a1dc-7530-8b7e-53068d07272f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e89f4-a1dc-7fe8-a502-7e1be1ee172f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019e89f4-a1dc-7530-8b7e-53068d07272f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e89f4-a1dc-7fe8-a502-7e1be1ee172f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89f4-a1dc-7fe8-a502-7e1be1ee172f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e89f4-a1dc-7fe8-a502-7e1be1ee172f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89f4-a1dc-7fe8-a502-7e1be1ee172f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89f4-a1dc-7048-818e-578462b0fad7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e89f4-a1dc-7fe8-a502-7e1be1ee172f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89f4-a1dc-7048-818e-578462b0fad7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_StockOptionsAwardsAndWarrantsMember_019f5b15-1fed-7ba9-ab93-2cd80c6651c0" xlink:href="glw-20260630.xsd#glw_StockOptionsAwardsAndWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e89f4-a1dc-7048-818e-578462b0fad7" xlink:to="loc_glw_StockOptionsAwardsAndWarrantsMember_019f5b15-1fed-7ba9-ab93-2cd80c6651c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019ead40-ba83-7ed2-b430-47c73d61f7ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019e89f4-a1dc-7530-8b7e-53068d07272f" xlink:to="loc_us-gaap_AwardTypeAxis_019ead40-ba83-7ed2-b430-47c73d61f7ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019ead40-ba83-7ed2-b430-47c73d61f7ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019ead40-ba83-7ed2-b430-47c73d61f7ee" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019ead40-ba83-7ed2-b430-47c73d61f7ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019ead40-ba83-7d4b-916e-d0e17e0e683e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019ead40-ba83-7ed2-b430-47c73d61f7ee" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019ead40-ba83-7d4b-916e-d0e17e0e683e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_StockOptionsAwardsAndWarrantsMember_019f5b14-dc9d-707c-868c-9cd1f60947b6" xlink:href="glw-20260630.xsd#glw_StockOptionsAwardsAndWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019ead40-ba83-7d4b-916e-d0e17e0e683e" xlink:to="loc_glw_StockOptionsAwardsAndWarrantsMember_019f5b14-dc9d-707c-868c-9cd1f60947b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e89f4-a1dc-78e9-86c4-7b568ef0d43d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_NetIncomeLoss_019e89f4-a1dc-78e9-86c4-7b568ef0d43d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e89f4-a1dc-7e71-9399-f81748a8edd6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e89f4-a1dc-7e71-9399-f81748a8edd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019e89f4-a1dc-7c1c-8153-9b51ba3cf4f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019e89f4-a1dc-7c1c-8153-9b51ba3cf4f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e89f4-a1dc-766f-8337-c69ab0dc535b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e89f4-a1dc-766f-8337-c69ab0dc535b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e89f4-a1dc-74ea-a15b-043ade4ea9ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e89f4-a1dc-74ea-a15b-043ade4ea9ac" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e89f4-a1dc-7360-a126-168516ae80c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e89f4-a1dc-7360-a126-168516ae80c1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e89f4-a1dc-7ee8-b7a7-37d52b9a159f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e89f4-a1dc-7b3c-9020-9fe0b4e9fab0" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e89f4-a1dc-7ee8-b7a7-37d52b9a159f" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ReportableSegmentsNarrativeDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ReportableSegmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ReportableSegmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019f46c2-3abd-7918-8df7-53a58a6beefa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f46c2-3abd-7b39-a19a-6c4632ea25b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f46c2-3abd-7918-8df7-53a58a6beefa" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f46c2-3abd-7b39-a19a-6c4632ea25b9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019f46c2-3abd-77df-9d57-a9797903c703" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f46c2-3abd-7b39-a19a-6c4632ea25b9" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019f46c2-3abd-77df-9d57-a9797903c703" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019f46c2-3abd-77df-9d57-a9797903c703_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019f46c2-3abd-77df-9d57-a9797903c703" xlink:to="loc_us-gaap_SegmentDomain_019f46c2-3abd-77df-9d57-a9797903c703_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019f46c2-3abd-79af-8c24-e0535570fd64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019f46c2-3abd-77df-9d57-a9797903c703" xlink:to="loc_us-gaap_SegmentDomain_019f46c2-3abd-79af-8c24-e0535570fd64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_GlassInnovationsMember_019f46c2-3abd-79a8-ab23-d177623f86c3" xlink:href="glw-20260630.xsd#glw_GlassInnovationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019f46c2-3abd-79af-8c24-e0535570fd64" xlink:to="loc_glw_GlassInnovationsMember_019f46c2-3abd-79a8-ab23-d177623f86c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_019f94c8-f9f9-7842-b31f-21c3f3329419" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f46c2-3abd-7b39-a19a-6c4632ea25b9" xlink:to="loc_srt_CurrencyAxis_019f94c8-f9f9-7842-b31f-21c3f3329419" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7842-b31f-21c3f3329419_default" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_019f94c8-f9f9-7842-b31f-21c3f3329419" xlink:to="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7842-b31f-21c3f3329419_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_019f94c8-f9f9-7842-b31f-21c3f3329419" xlink:to="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_JPY_019f94c8-f9f9-7cca-9da1-9a4a49902042" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_JPY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:to="loc_currency_JPY_019f94c8-f9f9-7cca-9da1-9a4a49902042" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_MXN_019f94c8-f9f9-77da-8bb0-b3652c7005b4" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_MXN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:to="loc_currency_MXN_019f94c8-f9f9-77da-8bb0-b3652c7005b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_CNY_019f94c8-f9f9-75a9-8566-fdc13c4dad54" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_CNY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:to="loc_currency_CNY_019f94c8-f9f9-75a9-8566-fdc13c4dad54" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_KRW_019f94c8-f9f9-7dbb-92dd-8319f7069e02" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_KRW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:to="loc_currency_KRW_019f94c8-f9f9-7dbb-92dd-8319f7069e02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_019f94c8-f9f9-7c16-aa17-ea22b5727c36" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:to="loc_currency_EUR_019f94c8-f9f9-7c16-aa17-ea22b5727c36" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_TWD_019f94c8-f9f9-72d4-9620-4dfcf71d9160" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_TWD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f94c8-f9f9-7da3-948f-2edcf7b4edfc" xlink:to="loc_currency_TWD_019f94c8-f9f9-72d4-9620-4dfcf71d9160" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019e89f4-a1dc-7a98-8dcc-08a9b6e71f97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f46c2-3abd-7918-8df7-53a58a6beefa" xlink:to="loc_us-gaap_NumberOfReportableSegments_019e89f4-a1dc-7a98-8dcc-08a9b6e71f97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageForeignCurrencyExchangeExposureHedgeRatePercent_019f94c8-f9f9-7492-873b-8f6e8eae5c1a" xlink:href="glw-20260630.xsd#glw_AverageForeignCurrencyExchangeExposureHedgeRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f46c2-3abd-7918-8df7-53a58a6beefa" xlink:to="loc_glw_AverageForeignCurrencyExchangeExposureHedgeRatePercent_019f94c8-f9f9-7492-873b-8f6e8eae5c1a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ReportableSegmentsScheduleHedgeRatesUsedinCalculatingtheAdjustmentforHedgedExposuresDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ReportableSegmentsScheduleHedgeRatesUsedinCalculatingtheAdjustmentforHedgedExposuresDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ReportableSegmentsScheduleHedgeRatesUsedinCalculatingtheAdjustmentforHedgedExposuresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019f4183-fa4c-754f-84f3-dd1eb9969d13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f4183-fa4c-73b0-802d-d5f8eed299a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f4183-fa4c-754f-84f3-dd1eb9969d13" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f4183-fa4c-73b0-802d-d5f8eed299a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_019f4183-fa4c-7f94-92a2-78cf8e901244" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f4183-fa4c-73b0-802d-d5f8eed299a5" xlink:to="loc_srt_CurrencyAxis_019f4183-fa4c-7f94-92a2-78cf8e901244" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019f4183-fa4c-7f94-92a2-78cf8e901244_default" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_019f4183-fa4c-7f94-92a2-78cf8e901244" xlink:to="loc_currency_AllCurrenciesDomain_019f4183-fa4c-7f94-92a2-78cf8e901244_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_019f4183-fa4c-7f94-92a2-78cf8e901244" xlink:to="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_JPY_019f4183-fa4c-77a3-a82e-53323d91e270" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_JPY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:to="loc_currency_JPY_019f4183-fa4c-77a3-a82e-53323d91e270" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_MXN_019f4183-fa4c-7bdb-b521-5d593339b5da" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_MXN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:to="loc_currency_MXN_019f4183-fa4c-7bdb-b521-5d593339b5da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_CNY_019f4183-fa4c-7872-b566-ff4f0b4d672b" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_CNY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:to="loc_currency_CNY_019f4183-fa4c-7872-b566-ff4f0b4d672b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_KRW_019f4183-fa4c-7a28-86a5-22276fe49a39" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_KRW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:to="loc_currency_KRW_019f4183-fa4c-7a28-86a5-22276fe49a39" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_019f4183-fa4c-7bc3-a80f-841a516ffc30" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:to="loc_currency_EUR_019f4183-fa4c-7bc3-a80f-841a516ffc30" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_TWD_019f4183-fa4c-7fdc-9cba-7ce3206870ef" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_TWD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019f4183-fa4c-75d9-994d-6bd08b782aeb" xlink:to="loc_currency_TWD_019f4183-fa4c-7fdc-9cba-7ce3206870ef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageForeignCurrencyExchangeRateTranslation_019f95ee-2188-7e24-aefc-7e4039a95c1c" xlink:href="glw-20260630.xsd#glw_AverageForeignCurrencyExchangeRateTranslation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f4183-fa4c-754f-84f3-dd1eb9969d13" xlink:to="loc_glw_AverageForeignCurrencyExchangeRateTranslation_019f95ee-2188-7e24-aefc-7e4039a95c1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageForeignCurrencyExchangeExposureHedgeRatePercent_019f4183-fa4c-7300-85b3-0497d0ac7510" xlink:href="glw-20260630.xsd#glw_AverageForeignCurrencyExchangeExposureHedgeRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f4183-fa4c-754f-84f3-dd1eb9969d13" xlink:to="loc_glw_AverageForeignCurrencyExchangeExposureHedgeRatePercent_019f4183-fa4c-7300-85b3-0497d0ac7510" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ReportableSegmentsScheduleofConstantCurrencyReportingDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ReportableSegmentsScheduleofConstantCurrencyReportingDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ReportableSegmentsScheduleofConstantCurrencyReportingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-73fd-9588-c49f65e7a9f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dc-7360-9a43-cf83099055b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-73fd-9588-c49f65e7a9f3" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dc-7360-9a43-cf83099055b9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_019e89f4-a1dc-72ed-8805-323a0945eda4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dc-7360-9a43-cf83099055b9" xlink:to="loc_srt_CurrencyAxis_019e89f4-a1dc-72ed-8805-323a0945eda4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-72ed-8805-323a0945eda4_default" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_019e89f4-a1dc-72ed-8805-323a0945eda4" xlink:to="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-72ed-8805-323a0945eda4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_019e89f4-a1dc-72ed-8805-323a0945eda4" xlink:to="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_JPY_019e89f4-a1dc-73b7-b120-73d4d6766e0a" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_JPY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:to="loc_currency_JPY_019e89f4-a1dc-73b7-b120-73d4d6766e0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_MXN_019e89f4-a1dc-70bb-b8cc-e5ab165b205a" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_MXN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:to="loc_currency_MXN_019e89f4-a1dc-70bb-b8cc-e5ab165b205a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_CNY_019e89f4-a1dc-7fe3-861b-1db16ac861ec" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_CNY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:to="loc_currency_CNY_019e89f4-a1dc-7fe3-861b-1db16ac861ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_KRW_019e89f4-a1dc-7118-8fbb-79943c5ced18" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_KRW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:to="loc_currency_KRW_019e89f4-a1dc-7118-8fbb-79943c5ced18" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_019e89f4-a1dc-7ffc-a330-475a2b60de8b" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:to="loc_currency_EUR_019e89f4-a1dc-7ffc-a330-475a2b60de8b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_TWD_019e89f4-a1dc-76da-99c3-569e68ffaead" xlink:href="https://xbrl.sec.gov/currency/2026/currency-2026.xsd#currency_TWD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019e89f4-a1dc-79b7-a211-f34fef71328c" xlink:to="loc_currency_TWD_019e89f4-a1dc-76da-99c3-569e68ffaead" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AverageForeignCurrencyExchangeRateTranslation_019e89f4-a1dc-79e8-aad9-ae817603424f" xlink:href="glw-20260630.xsd#glw_AverageForeignCurrencyExchangeRateTranslation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-73fd-9588-c49f65e7a9f3" xlink:to="loc_glw_AverageForeignCurrencyExchangeRateTranslation_019e89f4-a1dc-79e8-aad9-ae817603424f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ReportableSegmentsScheduleofSegmentInformationDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ReportableSegmentsScheduleofSegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ReportableSegmentsScheduleofSegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dc-77ab-ad38-923d3ebe6b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dc-77ab-ad38-923d3ebe6b6d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dc-7ace-b650-68da72bf0bcf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dc-77ab-ad38-923d3ebe6b6d" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dc-7ace-b650-68da72bf0bcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f4-a1dc-7ace-b650-68da72bf0bcf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dc-7ace-b650-68da72bf0bcf" xlink:to="loc_us-gaap_SegmentDomain_019e89f4-a1dc-7ace-b650-68da72bf0bcf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f4-a1dc-7df7-ad77-8bf3b83a9368" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dc-7ace-b650-68da72bf0bcf" xlink:to="loc_us-gaap_SegmentDomain_019e89f4-a1dc-7df7-ad77-8bf3b83a9368" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ReportableSegmentsMember_019e89f4-a1dc-702a-8beb-696832abbc67" xlink:href="glw-20260630.xsd#glw_ReportableSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f4-a1dc-7df7-ad77-8bf3b83a9368" xlink:to="loc_glw_ReportableSegmentsMember_019e89f4-a1dc-702a-8beb-696832abbc67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_OpticalCommunicationsMember_019e89f4-a1dc-7015-84d3-c0b1f329bdb9" xlink:href="glw-20260630.xsd#glw_OpticalCommunicationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_ReportableSegmentsMember_019e89f4-a1dc-702a-8beb-696832abbc67" xlink:to="loc_glw_OpticalCommunicationsMember_019e89f4-a1dc-7015-84d3-c0b1f329bdb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_GlassInnovationsMember_019e89f4-a1dc-7b19-a8ef-cc7ab0782e96" xlink:href="glw-20260630.xsd#glw_GlassInnovationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_ReportableSegmentsMember_019e89f4-a1dc-702a-8beb-696832abbc67" xlink:to="loc_glw_GlassInnovationsMember_019e89f4-a1dc-7b19-a8ef-cc7ab0782e96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AutomotiveMember_019e89f4-a1dc-7893-b760-9d7510350968" xlink:href="glw-20260630.xsd#glw_AutomotiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_ReportableSegmentsMember_019e89f4-a1dc-702a-8beb-696832abbc67" xlink:to="loc_glw_AutomotiveMember_019e89f4-a1dc-7893-b760-9d7510350968" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_SolarMember_019e89f4-a1dc-70fb-bc22-3a314f8dd398" xlink:href="glw-20260630.xsd#glw_SolarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_glw_ReportableSegmentsMember_019e89f4-a1dc-702a-8beb-696832abbc67" xlink:to="loc_glw_SolarMember_019e89f4-a1dc-70fb-bc22-3a314f8dd398" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_LifeSciencesAndEmergingGrowthBusinessesMember_019e89f4-a1dc-70aa-b456-a56a0baae8b3" xlink:href="glw-20260630.xsd#glw_LifeSciencesAndEmergingGrowthBusinessesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f4-a1dc-7df7-ad77-8bf3b83a9368" xlink:to="loc_glw_LifeSciencesAndEmergingGrowthBusinessesMember_019e89f4-a1dc-70aa-b456-a56a0baae8b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f4-a1dc-7ac3-a3f7-3ebe7abc39c4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dc-77ab-ad38-923d3ebe6b6d" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f4-a1dc-7ac3-a3f7-3ebe7abc39c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f4-a1dc-7ac3-a3f7-3ebe7abc39c4_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f4-a1dc-7ac3-a3f7-3ebe7abc39c4" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f4-a1dc-7ac3-a3f7-3ebe7abc39c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f4-a1dc-7dbb-a3fc-7cb8f7b71d02" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f4-a1dc-7ac3-a3f7-3ebe7abc39c4" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f4-a1dc-7dbb-a3fc-7cb8f7b71d02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f4-a1dc-73cc-b645-446fdcdcab0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f4-a1dc-7dbb-a3fc-7cb8f7b71d02" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f4-a1dc-73cc-b645-446fdcdcab0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NetSalesOfReportableSegmentsAndAllOther_019e89f4-a1dc-7ebf-8901-0f067ecedfaf" xlink:href="glw-20260630.xsd#glw_NetSalesOfReportableSegmentsAndAllOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_glw_NetSalesOfReportableSegmentsAndAllOther_019e89f4-a1dc-7ebf-8901-0f067ecedfaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ResearchDevelopmentAndEngineeringExpenses_019e89f4-a1dc-73ac-a728-2fa88c64054f" xlink:href="glw-20260630.xsd#glw_ResearchDevelopmentAndEngineeringExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_glw_ResearchDevelopmentAndEngineeringExpenses_019e89f4-a1dc-73ac-a728-2fa88c64054f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_019e89f4-a1dc-75f6-b099-a6985ffa07ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_Depreciation_019e89f4-a1dc-75f6-b099-a6985ffa07ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019e89f4-a1dc-7154-992d-6876d54e8c2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019e89f4-a1dc-7154-992d-6876d54e8c2a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e89f4-a1dd-7ccc-acf7-69bc7146155b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e89f4-a1dd-7ccc-acf7-69bc7146155b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e89f4-a1dd-76bf-9933-34720f791929" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_NetIncomeLoss_019e89f4-a1dd-76bf-9933-34720f791929" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019e89f4-a1dd-7e2c-bf79-8f13a9438f8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_EquityMethodInvestments_019e89f4-a1dd-7e2c-bf79-8f13a9438f8e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet_019e89f4-a1dd-7d02-a04c-f1e9466b7ee0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_AssetsNet_019e89f4-a1dd-7d02-a04c-f1e9466b7ee0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019e89f4-a1dd-7370-8116-9a4e9b72dfec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentExpenditureAdditionToLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019e89f4-a1dd-7370-8116-9a4e9b72dfec" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019e89f4-a1dd-7475-a06d-76171b0d3ff5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dc-7c47-93fb-888e1b9ebbf6" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019e89f4-a1dd-7475-a06d-76171b0d3ff5" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ReportableSegmentsScheduleofReconciliationofNetIncomeofReportableSegmentstoConsolidatedNetIncomeDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ReportableSegmentsScheduleofReconciliationofNetIncomeofReportableSegmentstoConsolidatedNetIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ReportableSegmentsScheduleofReconciliationofNetIncomeofReportableSegmentstoConsolidatedNetIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7b0e-8154-abec12224213" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-7b02-a7a8-54621472f1a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7b0e-8154-abec12224213" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-7b02-a7a8-54621472f1a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-768e-a611-450803737911" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-7b02-a7a8-54621472f1a7" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-768e-a611-450803737911" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-768e-a611-450803737911_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-768e-a611-450803737911" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-768e-a611-450803737911_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7fb8-9542-9a1d5c05c18a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-768e-a611-450803737911" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7fb8-9542-9a1d5c05c18a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f4-a1dd-7947-b488-a774fcefac7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7fb8-9542-9a1d5c05c18a" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f4-a1dd-7947-b488-a774fcefac7c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7806-8143-d934ea60f014" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-7b02-a7a8-54621472f1a7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7806-8143-d934ea60f014" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f4-a1dd-7806-8143-d934ea60f014_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7806-8143-d934ea60f014" xlink:to="loc_us-gaap_SegmentDomain_019e89f4-a1dd-7806-8143-d934ea60f014_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f4-a1dd-79f6-9215-0efe18c2bfce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7806-8143-d934ea60f014" xlink:to="loc_us-gaap_SegmentDomain_019e89f4-a1dd-79f6-9215-0efe18c2bfce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ReportableSegmentsMember_019e89f4-a1dd-7fef-a3e9-1daf2766bcb0" xlink:href="glw-20260630.xsd#glw_ReportableSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f4-a1dd-79f6-9215-0efe18c2bfce" xlink:to="loc_glw_ReportableSegmentsMember_019e89f4-a1dd-7fef-a3e9-1daf2766bcb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_LifeSciencesAndEmergingGrowthBusinessesMember_019e89f4-a1dd-7150-8f85-8389715e3c51" xlink:href="glw-20260630.xsd#glw_LifeSciencesAndEmergingGrowthBusinessesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f4-a1dd-79f6-9215-0efe18c2bfce" xlink:to="loc_glw_LifeSciencesAndEmergingGrowthBusinessesMember_019e89f4-a1dd-7150-8f85-8389715e3c51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_NetSalesOfReportableSegmentsAndAllOther_019e89f4-a1dd-770d-bf40-021b2281d1b3" xlink:href="glw-20260630.xsd#glw_NetSalesOfReportableSegmentsAndAllOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7b0e-8154-abec12224213" xlink:to="loc_glw_NetSalesOfReportableSegmentsAndAllOther_019e89f4-a1dd-770d-bf40-021b2281d1b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AdjustmentForHedgedExposures_019e89f4-a1dd-7ba2-9d99-654de5307935" xlink:href="glw-20260630.xsd#glw_AdjustmentForHedgedExposures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7b0e-8154-abec12224213" xlink:to="loc_glw_AdjustmentForHedgedExposures_019e89f4-a1dd-7ba2-9d99-654de5307935" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ImpactOfConstantCurrencyReporting_019f8b3b-1a1c-7d58-9854-639ed29f98d3" xlink:href="glw-20260630.xsd#glw_ImpactOfConstantCurrencyReporting"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7b0e-8154-abec12224213" xlink:to="loc_glw_ImpactOfConstantCurrencyReporting_019f8b3b-1a1c-7d58-9854-639ed29f98d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e89f4-a1dd-7697-8455-d50e56bea6e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7b0e-8154-abec12224213" xlink:to="loc_us-gaap_Revenues_019e89f4-a1dd-7697-8455-d50e56bea6e6" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.corning.com/role/ReportableSegmentsScheduleofReconciliationofReportableSegmentNetIncomeLosstoConsolidatedNetIncomeDetails" xlink:type="simple" xlink:href="glw-20260630.xsd#ReportableSegmentsScheduleofReconciliationofReportableSegmentNetIncomeLosstoConsolidatedNetIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.corning.com/role/ReportableSegmentsScheduleofReconciliationofReportableSegmentNetIncomeLosstoConsolidatedNetIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-78a3-be46-f0c708b101e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-78a3-be46-f0c708b101e8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-7050-877c-c20dc1d86009" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-78a3-be46-f0c708b101e8" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-7050-877c-c20dc1d86009" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7050-877c-c20dc1d86009_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-7050-877c-c20dc1d86009" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7050-877c-c20dc1d86009_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7a16-bf1f-13b109f9158c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f4-a1dd-7050-877c-c20dc1d86009" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7a16-bf1f-13b109f9158c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f4-a1dd-7d39-9cdf-ef321badecad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7a16-bf1f-13b109f9158c" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f4-a1dd-7d39-9cdf-ef321badecad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_019e89f4-a1dd-7266-9b4e-6eced248e0d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f4-a1dd-7a16-bf1f-13b109f9158c" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_019e89f4-a1dd-7266-9b4e-6eced248e0d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7eee-a6e5-2d7cb06fc6ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e89f4-a1dd-78a3-be46-f0c708b101e8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7eee-a6e5-2d7cb06fc6ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f4-a1dd-7eee-a6e5-2d7cb06fc6ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7eee-a6e5-2d7cb06fc6ef" xlink:to="loc_us-gaap_SegmentDomain_019e89f4-a1dd-7eee-a6e5-2d7cb06fc6ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f4-a1dd-708c-88d6-9a1b9bec8ff9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f4-a1dd-7eee-a6e5-2d7cb06fc6ef" xlink:to="loc_us-gaap_SegmentDomain_019e89f4-a1dd-708c-88d6-9a1b9bec8ff9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ReportableSegmentsMember_019e89f4-a1dd-7524-987f-d6f23414a4ea" xlink:href="glw-20260630.xsd#glw_ReportableSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f4-a1dd-708c-88d6-9a1b9bec8ff9" xlink:to="loc_glw_ReportableSegmentsMember_019e89f4-a1dd-7524-987f-d6f23414a4ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_LifeSciencesAndEmergingGrowthBusinessesMember_019e89f4-a1dd-7350-b46e-474b3f97a8ed" xlink:href="glw-20260630.xsd#glw_LifeSciencesAndEmergingGrowthBusinessesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f4-a1dd-708c-88d6-9a1b9bec8ff9" xlink:to="loc_glw_LifeSciencesAndEmergingGrowthBusinessesMember_019e89f4-a1dd-7350-b46e-474b3f97a8ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e89f4-a1dd-7dfd-aa62-acd2a8cd14b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_us-gaap_NetIncomeLoss_019e89f4-a1dd-7dfd-aa62-acd2a8cd14b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_AdjustmentForHedgedExposures_019e89f4-a1dd-75b0-9305-4f3d159104a1" xlink:href="glw-20260630.xsd#glw_AdjustmentForHedgedExposures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_glw_AdjustmentForHedgedExposures_019e89f4-a1dd-75b0-9305-4f3d159104a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ImpactOfConstantCurrencyReporting_019f8b3c-a097-703d-a12d-7f1e7f096a69" xlink:href="glw-20260630.xsd#glw_ImpactOfConstantCurrencyReporting"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_glw_ImpactOfConstantCurrencyReporting_019f8b3c-a097-703d-a12d-7f1e7f096a69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_TranslatedEarningsContractLossGainNet_019e89f4-a1dd-714f-807a-5d386f08e5f7" xlink:href="glw-20260630.xsd#glw_TranslatedEarningsContractLossGainNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_glw_TranslatedEarningsContractLossGainNet_019e89f4-a1dd-714f-807a-5d386f08e5f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_TranslationGainLossOnForeignDenominatedDebtNet_019e89f4-a1dd-7be0-91ea-3488353e88b0" xlink:href="glw-20260630.xsd#glw_TranslationGainLossOnForeignDenominatedDebtNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_glw_TranslationGainLossOnForeignDenominatedDebtNet_019e89f4-a1dd-7be0-91ea-3488353e88b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ResearchDevelopmentAndEngineeringExpenses_019e89f4-a1dd-793e-8461-3f32738b3afe" xlink:href="glw-20260630.xsd#glw_ResearchDevelopmentAndEngineeringExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_glw_ResearchDevelopmentAndEngineeringExpenses_019e89f4-a1dd-793e-8461-3f32738b3afe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019e89f4-a1dd-7d46-8028-7382142ef4ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019e89f4-a1dd-7d46-8028-7382142ef4ed" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019e89f4-a1dd-711f-9314-2b754203cc46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019e89f4-a1dd-711f-9314-2b754203cc46" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e89f4-a1dd-7d5d-88b3-bd96da43ccff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e89f4-a1dd-7d5d-88b3-bd96da43ccff" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_RestructuringImpairmentAndOtherChargesAndCredits_019e89f4-a1dd-7829-a465-9f6ff6893a55" xlink:href="glw-20260630.xsd#glw_RestructuringImpairmentAndOtherChargesAndCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_glw_RestructuringImpairmentAndOtherChargesAndCredits_019e89f4-a1dd-7829-a465-9f6ff6893a55" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_glw_ReconciliationOfOtherCorporateItems_019e89f4-a1dd-715f-b15c-5c4120f115c5" xlink:href="glw-20260630.xsd#glw_ReconciliationOfOtherCorporateItems"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_glw_ReconciliationOfOtherCorporateItems_019e89f4-a1dd-715f-b15c-5c4120f115c5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e89f4-a1dd-7a4f-946d-6efbfbfeb88d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f4-a1dd-7567-a651-5ae3ec73a928" xlink:to="loc_us-gaap_ProfitLoss_019e89f4-a1dd-7a4f-946d-6efbfbfeb88d" xlink:type="arc" order="11"/>
  </link:definitionLink>
</link:linkbase>
