Whisker \Whisk"er\, n.

1. One who, or that which, whisks, or moves with a quick, sweeping motion.

2. Formerly, the hair of the upper lip; a mustache; -- usually in the plural.

Hoary whiskers and a forky beard. --Pope.

3. pl. That part of the beard which grows upon the sides of the face, or upon the chin, or upon both; as, side whiskers; chin whiskers.

4. A hair of the beard.

5. One of the long, projecting hairs growing at the sides of the mouth of a cat, or other animal.

6. pl. (Naut.) Iron rods extending on either side of the bowsprit, to spread, or guy out, the stays, etc.

Source: Webster's Revised Unabridged Dictionary (1913)