Definition of "whisker"

That part of the beard which grows upon the sides of the face, usually of the male, or upon the chin, or upon both.  examples

A hair of the beard.  examples

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

(colloquial) The (very small) distance between two things.  examples

(nautical) Spreaders from the bows to spread the bowsprit shrouds.  examples

(statistics) A graphic element that shows the maxima and minima in a box plot.  examples

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

(metallurgy) A small tendril that forms on metal.  examples