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mother tongue

[muhth -er tuhng for 1; muhth -er tuhng for 2] /ˈmʌð ər ˈtʌŋ for 1; ˈmʌð ər ˌtʌŋ for 2/
noun
1.
the language first learned by a person; native language.
Origin
1350-1400
1350-1400; Middle English moder tonge
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for mother tongue

mother tongue

noun
1.
the language first learned by a child
2.
a language from which another has evolved
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for mother tongue
noun

See native language

Dictionary.com's 21st Century Lexicon
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Difficulty index for mother tongue

Few English speakers likely know this word

Word Value for mother

11
11
Scrabble Words With Friends

Quotes with mother tongue