I. ˈməm adjective
Etymology: Middle English mom, momme, probably imitative of a sound made with closed lips
Date: 14th century
: silent
keep mum
II. intransitive verb
( mummed ; mum·ming )
Etymology: Middle English mommen, to mumble, perform (a mummer's play), probably in part from mom, in part from Middle French momer to go masked
Date: 1530
1. : to perform in a pantomime
2. : to go about merrymaking in disguise during festivals
III. noun
Etymology: German Mumme
Date: 1640
: a strong ale or beer
IV.
chiefly British variant of mom
V. noun
Date: 1917
: chrysanthemum