n. 髭, 小胡子, 触须

[ noun ]
an unshaved growth of hair on the upper lip
<noun.body>
he looked younger after he shaved off his mustache

Moustache \Mous`tache"\, n. [F.]
Mustache.

Mustache \Mus*tache"\ (m[u^]s*t[.a]sh"; 277), n.; pl.
{Mustaches}. [Written also {moustache}.] [F. moustache, It.
mostaccio visage, mostacchio mustache, fr. Gr. my`stax upper
lip and the beard upon it; cf. ma`stax mouth: cf. Sp.
mostacho.]
1. That part of the beard which grows on the upper lip; hair
left growing above the mouth.

2. (Zo["o]l.) A West African monkey ({Cercopithecus cephus}).
It has yellow whiskers, and a triangular blue mark on the
nose.

3. (Zo["o]l.) Any conspicuous stripe of color on the side of
the head, beneath the eye of a bird.

4. A stain or discoloration on the upper lip of a person; as,
wearing a milk mustache. [informal]
[PJC]