idiom
/ˈɪdɪəm/noun
1
- a group of words established by usage as having a meaning not deducible from those of the individual words (e.g. over the moon, see the light)成语（如over the moon, see the light）。
1.1
- mass noun a form of expression natural to a language, person, or group of people习语：
he had a feeling for phrase and idiom.
他对短语和习语有特别悟性。
1.2
- the dialect of a people or part of a country方言, 土语。
2
- a characteristic mode of expression in music or art（音乐、美术的）表达风格; 特色：
they were both working in a neo-Impressionist idiom.
他们两人都运用新印象派表达风格。
词源
late 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'.