D defs.my
Entry 4 senses · 4 variants Webster, 1913

Mum

/mŭm/ · IPA /mʌm/
01 a. Silent; not speaking; as, to keep mum.
  1. 1.
    Silent; not speaking; as, to keep mum.
    “The citizens are mum, and speak not a word.” Shak.
Phrases & compounds
mum's the word — keep this a secret; don't tell anybody.
02 interj. Be silent! Hush!
  1. 1.
    Be silent! Hush!
    Mum, then, and no more.” Shak.
03 n. Silence.
  1. 1.
    Silence.[R.]
04 n. A sort of strong beer, originally made in Brunswick, Germany.
  1. 1.
    A sort of strong beer, originally made in Brunswick, Germany.
    “The clamorous crowd is hushed with mugs of mum.” Pope.