Mus*tache" (?), n.; pl. Mustaches (). [Written also moustache.] [F. moustache, It. mostaccio visage, mostacchio mustache, fr. Gr. upper lip and the beard upon it; cf. mouth: cf. Sp. mostacho.]
1.
That part of the beard which grows on the upper lip; hair left growing above the mouth.
2. Zool.
A West African monkey (Cercopithecus cephus). It has yellow whiskers, and a triangular blue mark on the nose.
3. Zool.
Any conspicuous stripe of color on the side of the head, beneath the eye of a bird.
© Webster 1913.