Mustache /(mŭs*tȧsh"; 277)/

pl. Mustaches

1. That part of the beard which grows on the upper lip; hair left growing above the mouth.
2. A West African monkey (Cercopithecus cephus). It has yellow whiskers, and a triangular blue mark on the nose. (Zool.)
3. Any conspicuous stripe of color on the side of the head, beneath the eye of a bird. (Zool.)
4. A stain or discoloration on the upper lip of a person; as, wearing a milk mustache. [informal]