keep one's mouth shut
Definition of keep one's mouth shut
1 : to not say anything When he starts talking about politics, I just keep my mouth shut.
2 : to not talk about something (such as a secret) She told me to keep my mouth shut about the news. I never tell him anything important because he doesn't know how to keep his mouth shut.
Word by Word Definitions
: to take notice of by appropriate conduct : fulfill: such as
: to be faithful to
: to act fittingly in relation to
: custody, charge
: one that keeps or protects: such as
: speak, pronounce
: to utter bombastically : declaim
: to repeat without comprehension or sincerity
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