1.[countableC]SLWORD, PHRASE, OR SENTENCE a group of words that has a special meaning that is different from the ordinary meaning of each separateword. For example, ‘under the weather’ is an idiom meaning ‘ill’. 习语,成语► see thesaurus at phrase, word
2[countableC, uncountableU] formal or technicalSLTYPICAL a style of expression in writing, speech, or music that is typical of a particular group of people 〔某群体在写作、言语、音乐方面典型的〕风格,特色