n.

1. 慣用語；成語；習慣語[C]
   To pull one's leg is an idiom.

   "to pull one's leg"（同某人開玩笑）是慣用語。

2. 方言，土話；（個人特有）用語[C]
   He spoke in the idiom of the New England countryside.

   他講新英格蘭鄉下的方言。

3. （某一）語言的習慣用法；（某一）語言的特性[U][C]
   She reads with a sharp eye for idiom.

   她閱讀時以敏銳的目光審視語言的習慣用法。

4. （在音樂、美術等方面所表現的）風格，特色[C][U]
   the idiom of modern popular music

   現代通俗音樂的風格

n.

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).
   ▸a form of expression natural to a language, person, or group.
2. a characteristic mode of expression in music or art.