Silent; not speaking.
- Not verbalizing; silent.
- Used as a command to stop speaking.
- mum's the word Say nothing of the secret you know: Mum's the word on the surprise party.
- To act or play in a pantomime.
- To go merrymaking in a mask or disguise especially during a festival.
- Chiefly British Mother.
- A chrysanthemum.
- A strong beer originally brewed in Brunswick, Germany.