There are 3 definitions of mum in English:

mum1

Line breaks: mum
Pronunciation: /mʌm
 
/

adjective

[predicative]
Silent.
More example sentences
  • They kept their engagement and pregnancy mum for months.
  • Well the most wonderful thing happened last night, but I have to be mum on the subject, so I can't say a word.
  • However, his doctors are still remaining mum on his condition until the complete tests take place later this week.

Origin

late Middle English: imitative of a sound made with closed lips.

Phrases

keep mum

informal Remain silent, especially so as not to reveal a secret: he was keeping mum about a possible move to West Ham
More example sentences
  • Think what you may; keeping mum gives me one secret more.
  • A good friend can keep mum about your deepest darkest secrets.
  • The CIA though has conveniently kept mum as of now.

mum's the word

informal (As a request or warning) say nothing; do not reveal a secret: I know I can rely upon your discretion, mum’s the word
More example sentences
  • Go out and have some fun, but remember, mum's the word!
  • But the best thing of all about all the hand-outs in this welfare state is that mum's the word, when it comes to explaining to taxpayers why you need their money.
  • The mystery is certainly captivating Washington, while mum's the word at the White House.
Synonyms
say nothing, keep quiet, don't breathe a word, don't tell a soul, don't give the game away, keep it secret, keep it to yourself, keep it under your hat, play dumb; Scottishplay the daft baddie/lassie
informal don't let on, keep shtum, don't let the cat out of the bag

Definition of mum in:

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Word of the day meretricious
Pronunciation: ˌmɛrɪˈtrɪʃəs
adjective
apparently attractive but having no real value...

There are 3 definitions of mum in English:

mum2

Line breaks: mum
Pronunciation: /mʌm
 
/

noun

informal
A cultivated chrysanthemum.
More example sentences
  • Whether you want to compete or simply collect mums, the National Chrysanthemum Society has 43 chapters across the country.
  • Saint Mary's Church was decorated with pink and white mums.
  • Autumn's butterflies - fritillaries and migrating monarchs - match the burnt-orange mums just beginning to bloom.

Origin

late 19th century: abbreviation.

Definition of mum in:

There are 3 definitions of mum in English:

mum3

Line breaks: mum
Pronunciation: /mʌm
 
/

noun

British informal
One’s mother: she often goes round to see her mum, who lives nearby [as name]: Jane worried all the way home about telling Mum
More example sentences
  • Her comparison of older mothers to teenage mums and her call for government intervention is likely to prove highly controversial.
  • Here we speak to a first-time mum, a mother of four and that other essential to baby-making, a father, about their experiences of life after childbirth.
  • Like his mum - and her mother before her - Tom suffers from aura migraines.

Origin

mid 17th century: abbreviation of mummy2.

Definition of mum in: