"idiom" in the noun sense
1. parlance, idiom
a manner of speaking that is natural to native speakers of a language
2. dialect, idiom, accent
the usage or vocabulary that is characteristic of a specific group of people
"the immigrants spoke an odd dialect of English"
"he has a strong German accent"
"it has been said that a language is a dialect with an army and navy"
3. artistic style, idiom
the style of a particular artist or school or movement
"an imaginative orchestral idiom"
4. idiom, idiomatic expression, phrasal idiom, set phrase, phrase
an expression whose meanings cannot be inferred from the meanings of the words that make it up
Source: WordNet® (An amazing lexical database of English)
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