Definition of heritage language noun from the Oxford Advanced Learner's Dictionary

 

heritage language

 noun
noun
BrE BrE//ˈherɪtɪdʒ læŋɡwɪdʒ//
 
; NAmE NAmE//ˈherɪtɪdʒ læŋɡwɪdʒ//
 
 
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a language that a child learns at home from their parents that is not the main language of the country they are living in Within two or three generations most immigrants have lost or almost lost their heritage language. The fastest growing heritage language population in the United States is Hispanic Americans.