I. ˈmü verb
( -ed/-ing/-s )
Etymology: imitative
intransitive verb
: to make the natural throat noise of a cow : low
transitive verb
: to utter with a sound resembling the lowing of a cow
meltingly moo a religious ballad — Punch
II. noun
( -s )
1. : the lowing of a cow
2. : a sound that resembles a moo