mother tongue Meaning in Cambridge English Dictionary
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Meaning of "mother tongue" - English Dictionary

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mother tonguenoun [C usually singular]

uk   us  
B2 the first language that you learn when you are a baby, rather than a language learned at school or as an adult
Translations of “mother tongue”
in Chinese (Traditional) 母語, 本國語, 本族語…
in Russian родной язык…
in Turkish ana dil…
in Chinese (Simplified) 母语, 本国语, 本族语…
in Polish język ojczysty…
(Definition of mother tongue from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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