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English definition of “first language”

first language

  /ˈfɜrst ˈlæŋ.ɡwɪdʒ/ noun
the language that someone learns to speak first: Madeleine’s first language is French, but she also speaks German fluently.
(Definition of first language noun from the Webster's Essential Mini Dictionary © Cambridge University Press)

Definitions of “first language” in other dictionaries

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