An example of idiom is the phrase "a dime a dozen."
The idiom of the French impressionists; the punk rock idiom.
The idiom of Hemingway.
Origin of idiom
- Late Latin idiōma idiōmat- from Greek from idiousthai to make one's own from idios own, personal, private s(w)e- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle French idiome, and its source, Late Latin idioma, from Ancient Greek ἰδίωμα (idioma, “a peculiarity, property, a peculiar phraseology, idiom”), from ἰδιοῦσθαι (idiousthai, “to make one's own, appropriate to oneself”), from ἴδιος (idios, “one's own, pertaining to oneself, private, personal, peculiar, separate”).