mum
1. [ adjective ] failing to speak or communicate etc when expected to
Synonyms: silent
Examples:

"the witness remained silent"

Related terms: uncommunicative
2. [ noun ] informal terms for a mother
Synonyms: ma mama mamma mommy mummy momma mammy mater mom
Related terms: mother
3. [ noun ] (botany) of China
Synonyms: florists'_chrysanthemum Dendranthema_grandifloruom Chrysanthemum_morifolium florist's_chrysanthemum
Related terms: chrysanthemum
4. [ noun ] secrecy
Examples:

"mum's the word"

Related terms: secrecy
Similar spelling:   Mumm
  Muma
  mummy
  Mumme
  Mumma
  Mumaw
  muumuu
  Mun
  muon
  Munn