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English definition of “idiom”

idiom

noun     /ˈɪd.i.əm/
B2 [C] a group of words in a fixed order that have a particular meaning that is different from the meanings of each word on its own: To "have bitten off more than you can chew " is an idiom that means you have tried to do something which is too difficult for you.Figurative use of languageSentences and expressions [C or U] formal the style of expression in writing, speech , or music that is typical of a particular period , person , or group : Both operas are very much in the modern idiom.Linguistic terms and linguistic style
(Definition of idiom noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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