keep one's mouth shut

idiom

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.

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Dictionary Entries Near keep one's mouth shut

keep one's mind on

keep one's mouth shut

keep one's nose out of

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Cite this Entry

“Keep one's mouth shut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/keep%20one%27s%20mouth%20shut. Accessed 23 Oct. 2021.

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