mum

1 of 5

adjective

Synonyms of mumnext
: silent
keep mum

mum

2 of 5

verb

mummed; mumming

intransitive verb

1
: to perform in a pantomime
2
: to go about merrymaking in disguise during festivals

mum

3 of 5

noun (1)

: a strong ale or beer

mum

4 of 5

chiefly British spelling of mom

mum

5 of 5

noun

Examples of mum in a Sentence

Adjective I'd like to know how much they paid, but they've been mum on that subject. kept mum about the surprise bridal shower
Recent Examples on the Web
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.
Adjective
As for what’s inside, Baglietto has been mum on the details, but other yachts in the line can host 12 guests across five cabins onboard. Nicole Hoey, Robb Report, 30 Jan. 2026 But three of North Carolina’s Republican representatives — Virginia Foxx, Richard Hudson and David Rouzer — were mum about the situation as of Thursday afternoon. Mary Ramsey, Charlotte Observer, 29 Jan. 2026
Verb
Smith stays largely mum on the news of the day, be that Kirk’s killing, or ICE raids, or whatever hells await in the coming weeks. Sam Kestenbaum, Vulture, 2 Jan. 2026 So did mum and dad politely decline to go or were they not invited? Madeleine Marr, Miami Herald, 8 Aug. 2025
Noun
Despite their high-profile hangouts, Earle and Brady have kept mum on the status of their relationship. Christina Perrier, InStyle, 9 Feb. 2026 Here's what one House committee member had to say about Maxwell's decision to stay mum. Kathryn Palmer, USA Today, 9 Feb. 2026 See All Example Sentences for mum

Word History

Etymology

Adjective

Middle English mom, momme, probably imitative of a sound made with closed lips

Verb

Middle English mommen, to mumble, perform (a mummer's play), probably in part from mom, in part from Middle French momer to go masked

Noun (1)

German Mumme

First Known Use

Adjective

14th century, in the meaning defined above

Verb

15th century, in the meaning defined at sense 1

Noun (1)

circa 1623, in the meaning defined above

Noun

1891, in the meaning defined above

Time Traveler
The first known use of mum was in the 14th century

Browse Nearby Words

Cite this Entry

“Mum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mum. Accessed 11 Feb. 2026.

Kids Definition

mum

1 of 3 adjective
: silent sense 1
keep mum

mum

2 of 3 noun

mum

3 of 3

chiefly British variant of mom

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