mouth
• noun 1 the opening in the body of most animals through which food is taken and sounds are emitted. 2 an opening or entrance to a structure that is hollow, concave, or almost completely enclosed. 3 the place where a river enters the sea. 4 informal impudent talk. • verb 1 move the lips as if to form (words). 2 say in an insincere or pompous way. 3 (mouth off) informal talk in an opinionated or abusive way. 4 take in or touch with the mouth. — PHRASES be all mouth (and no trousers) informal tend to talk boastfully but not to act on one’s words. keep one’s mouth shut informal say nothing, especially to avoid revealing a secret. — ORIGIN Old English.
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