- (intransitive) (of a cow, bull, etc) to make a characteristic deep long sound; low
- an instance or imitation of this sound
For the verb: "to moo"
WordReference Random House Learner's Dictionary of American English © 2017
moo /mu/USA pronunciation n., pl. moos, v., mooed, moo•ing.WordReference Random House Unabridged Dictionary of American English © 2017
v. [no object]
moo (mo̅o̅),USA pronunciation v., mooed, moo•ing, n., pl. moos.
Collins Concise English Dictionary © HarperCollins Publishers::
moo /muː/ vb
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