mum
1 Americanadjective
interjection
idioms
noun
noun
noun
noun
adjective
noun
noun
verb
noun
Usage
What does mum mean? Mum is an adjective that means keeping quiet. It can also be used by itself to mean Be quiet!This sense of mum is especially used in the expressions keep mum and mum’s the word. In the U. K. and other places, mum is used as a word for mom or madam. It’s also commonly used as a short way of saying chrysanthemum, a type of flower. Example: Mum’s keeping mum—I can’t get a word out of her!
Etymology
Origin of mum1
First recorded in 1350–1400; Middle English momme; imitative
Origin of mum2
First recorded in 1350–1400; Middle English mommen, verb use of mum 1; compare Middle Dutch mommen ”to act the mummer's part”
Origin of mum3
First recorded in 1890–95; shortened form
Origin of mum4
First recorded in 1815–25; nursery word; see mom
Origin of mum5
First recorded in 1630–40; from German Mumme, said to have been named after Christian Mumme, the brewer who made it
Origin of mum6
Variant of ma'am
Explanation
Someone who's mum has nothing to say, especially on a particular subject. If you agree to keep someone's secret, you could tell them, "Mum's the word!" A shy child who's new at school might stay mum all day, and even your most talkative friend might remain mum on controversial topics like religion and politics. In many parts of the world, mum is also a nickname for your mother — and it's also a nickname for the flower called a chrysanthemum. The "quiet" meaning of mum comes from Old English, inspired by the "mmm" sound you make when your lips are closed.
Vocabulary lists containing mum
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Single mum Emma Neil was a huge fan of Vinted, using it most days to sell old things and buy clothes for her children.
From BBC ● Aug. 18, 2026
Teenager Carys Edwards, 18, was among those to turn out with her mum, calling the Welsh legend "an inspiration to everybody".
From Barron's ● Aug. 15, 2026
Edwards's mum Melanie Smith, 53, added: "Most importantly, she was a Swansea girl, and she didn't forget that."
From Barron's ● Aug. 15, 2026
Their mum Tracey said she felt "really lucky" to see a second solar eclipse in her lifetime.
From BBC ● Aug. 12, 2026
“Now we just need to sneak off to the station and make it back to Bletchley before the Germans bomb or Marion tells my mum we’re dead.”
From "The Bletchley Riddle" by Ruta Sepetys and Steve Sheinkin
Along with the buzz on Twitter, Instagram mummed with the news of Herbert’s new deal.
From Los Angeles Times ● Sep. 6, 2023
From the ancient Irish practice of mumming to walking the red carpet, the Armagh Rhymers were central to a meeting of myth and couture for McQueen's Paris Fashion Week show.
From BBC ● Oct. 9, 2025
Historically, mumming saw groups dress up in masks and costume, going from house to house to perform poetry, theatre, music and dance.
From BBC ● Oct. 9, 2025
As Farmer's Almanac notes, there was also a custom to literally put on a little show at a strangers doorstep, which was called "mumming."
From Salon ● Oct. 31, 2022
His accent is good, his mumming of characteristic meticulousness.
From Time Magazine Archive
Now we had planned at home that we would use only P-speech while mumming, for then no one would know us.
From What Happened to Inger Johanne As Told by Herself by Dikken Zwilgmeyer
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
