<?xml version="1.0" encoding="UTF-8"?>
<!-- XBRL document created with DocuBuilder 4.7 by Data Communique, Inc. -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:delaware="http://delaware/20130121" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Series" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#SeriesOnly"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Class" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ClassOnly"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Prospectus" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ProspectusOnly"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceTableData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#PerformanceTableData"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ExpenseExample" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ExpenseExample"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/OperatingExpensesData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#OperatingExpensesData"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ShareholderFeesData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ShareholderFeesData"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ExpenseExampleNoRedemption"/>
	<link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasure" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#PerformanceMeasureOnly"/>
	<link:roleRef roleURI="http://delaware/role/PerformanceTableDataAAAA" xlink:type="simple" xlink:href="ck0000773675-20121228.xsd#PerformanceTableDataAAAA"/>
	<link:roleRef roleURI="http://delaware/role/ExpenseExampleAAAA" xlink:type="simple" xlink:href="ck0000773675-20121228.xsd#ExpenseExampleAAAA"/>
	<link:roleRef roleURI="http://delaware/role/OperatingExpensesDataAAAA" xlink:type="simple" xlink:href="ck0000773675-20121228.xsd#OperatingExpensesDataAAAA"/>
	<link:roleRef roleURI="http://delaware/role/ShareholderFeesDataAAAA" xlink:type="simple" xlink:href="ck0000773675-20121228.xsd#ShareholderFeesDataAAAA"/>
	<link:roleRef roleURI="http://delaware/role/ExpenseExampleNoRedemptionAAAA" xlink:type="simple" xlink:href="ck0000773675-20121228.xsd#ExpenseExampleNoRedemptionAAAA"/>
	<link:roleRef roleURI="http://delaware/role/BarChartDataAAAA" xlink:type="simple" xlink:href="ck0000773675-20121228.xsd#BarChartDataAAAA"/>
	<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: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/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/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:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Prospectus">
		<link:loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_DocumentDomain" xlink:label="DocumentDomain"/>
		<link:loc xlink:type="locator" xlink:href="ck0000773675-20121228.xsd#delaware_AAAAMember" xlink:label="AAAAMember"/>
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="AAAAMember" use="optional" order="2.0"/>
	</link:definitionLink>
	<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Series">
		<link:loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_EntityDomain" xlink:label="EntityDomain"/>
		<link:loc xlink:type="locator" xlink:href="ck0000773675-20121228.xsd#delaware_S000002408Member" xlink:label="S000002408Member"/>
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000002408Member" order="2.0"/>
	</link:definitionLink>
	<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Class">
		<link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_ShareClassDomain" xlink:label="ShareClassDomain"/>
		<link:loc xlink:type="locator" xlink:href="ck0000773675-20121228.xsd#delaware_C000006398Member" xlink:label="C000006398Member"/>
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006398Member" order="2.0"/>
		<link:loc xlink:type="locator" xlink:href="ck0000773675-20121228.xsd#delaware_C000006399Member" xlink:label="C000006399Member"/>
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006399Member" order="3.0"/>
		<link:loc xlink:type="locator" xlink:href="ck0000773675-20121228.xsd#delaware_C000006400Member" xlink:label="C000006400Member"/>
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006400Member" order="4.0"/>
	</link:definitionLink>
	<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasure">
		<link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
		<link:loc xlink:type="locator" xlink:href="ck0000773675-20121228.xsd#delaware_benchmark0099AAAAMember" xlink:label="benchmark0099AAAAMember"/>
		<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="benchmark0099AAAAMember" order="116954.0"/>
	</link:definitionLink>
</link:linkbase>
