keep/stay mum
idiom
informal
: to not tell anyone (about something)
She told him to keep/stay mum about the project.
Examples of keep/stay mum in a Sentence
Recent Examples on the Web
That's quite a compliment from the King of Horror, a man not known to keep mum if an adaptation of one of his works is not to his liking.
—
Jordan Hoffman, EW.com, 1 May 2025
Quiet luxury pertains to more than just a fashion trend, as high-end brands tend to keep mum on their sustainability efforts.
—Carved In Blue, Sourcing Journal, 30 Apr. 2025
And the creative team continues to stay mum about the punctuation mark.
—Eliana Dockterman, Time, 17 Apr. 2025
Defense & National Security The Big Story Outrage over drones grows as federal agencies stay mum
Officials across the U.S. northeast are growing increasingly worried about the now-regular spotting of drones, with lawmakers calling for answers and more transparency from federal agencies.
—Ellen Mitchell, The Hill, 13 Dec. 2024
See All Example Sentences for keep/stay mum
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Jordan Hoffman, EW.com, 1 May 2025
Quiet luxury pertains to more than just a fashion trend, as high-end brands tend to keep mum on their sustainability efforts.
—Carved In Blue, Sourcing Journal, 30 Apr. 2025
And the creative team continues to stay mum about the punctuation mark.
—Eliana Dockterman, Time, 17 Apr. 2025
Defense & National Security The Big Story Outrage over drones grows as federal agencies stay mum
Officials across the U.S. northeast are growing increasingly worried about the now-regular spotting of drones, with lawmakers calling for answers and more transparency from federal agencies.
—Ellen Mitchell, The Hill, 13 Dec. 2024
See All Example Sentences for keep/stay mum
Cite this Entry
“Keep/stay mum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/keep%2Fstay%20mum. Accessed 20 May. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share