【正确答案】：
IDIOMS CONSIST OF SET PHRASES AND SHORT SENTENCES, WHICH ARE PECULIAR TO THE LANGUAGE IN QUESTION AND LOADED WITH THE NATIVE CULTURES AND IDEAS. IN A BROAD SENSE, IDIOMS MAY INCLUDE COLLOQUIALISMS CATCHPHRASES, SLANG EXPRESSIONS, PROVERBS, ETC.
【题目解析】：本题考查习语的定义。Idioms consist of set phrases and short sentences, which are peculiar to the language in question and loaded with the native cultures and ideas. In a broad sense, idioms may include colloquialisms catchphrases, slang expressions, proverbs, etc.