- That part of the beard which grows on the upper lip; hair
left growing above the mouth. - A West African monkey (Cercopithecus cephus). It has
yellow whiskers, and a triangular blue mark on the nose. - Any conspicuous stripe of color on the side of the head,
beneath the eye of a bird.
Meaning of 'mustache' (Princeton's WordNet)
1 . mustache
[ n]
Meaning (1): - an unshaved growth of hair on the upper lip
Example in sentence:
he looked younger after he shaved off his mustache