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Definition of idiom noun from the Oxford Advanced Learner's Dictionary

idiom

noun
 
/ˈɪdiəm/
 
/ˈɪdiəm/
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  1. [countable] a group of words whose meaning is different from the meanings of the individual words
    • ‘Let the cat out of the bag’ is an idiom meaning to tell a secret by mistake.
    Synonyms wordwordterm phrase expression idiomThese are all words for a unit of language used to express something.word a single unit of language that means something and can be spoken or written:
    • Do not write more than 200 words.
    • He uses a lot of long words.
    term (rather formal) a word or phrase used as the name of something, especially one connected with a particular type of language:
    • technical/​legal/​scientific terms
    • ‘Old man’ is a slang term for ‘father’.
    phrase a group of words that have a particular meaning when used together:
    • Who coined the phrase ‘fake news’?
    In grammar, a phrase is a group of words without a finite verb, especially one that forms part of a sentence: ‘the green car’ and ‘on Friday morning’ are phrases.
    expression a word or phrase:
    • He tends to use a lot of slang expressions that I’ve never heard before.
    idiom a group of words whose meaning is different from the meanings of the individual words:
    • ‘Let the cat out of the bag’ is an idiom meaning to tell a secret by mistake.
    Patterns
    • a word/​term for something
    • a new word/​term/​phrase/​expression
    • a technical/​colloquial word/​term/​phrase/​expression
    • a slang word/​term/​phrase
    • an idiomatic phrase/​expression
    • to use a(n) word/​term/​phrase/​expression/​idiom
    • to coin a(n) word/​term/​phrase/​expression
    • a(n) word/​term/​phrase/​expression/​idiom means something
    Topics Languagec1
  2. [uncountable, countable] (formal) the kind of language and grammar used by particular people at a particular time or place
    • The friends would sometimes revert to playground idiom.
    Topics Languagec1
  3. [uncountable, countable] (formal) the style of writing, music, art, etc. that is typical of a particular person, group, period or place
    • the classical/contemporary/popular idiom
    • He has produced a classical play in a modern idiom.
  4. Word Originlate 16th cent.: from French idiome, or via late Latin from Greek idiōma ‘private property, peculiar phraseology’, from idiousthai ‘make one's own’, from idios ‘own, private’.
See idiom in the Oxford Advanced American DictionarySee idiom in the Oxford Learner's Dictionary of Academic English
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