- [countable]
any of the long, stiff hairs that grow near the mouth of a cat, mouse, etc. （猫、鼠等的）须 
- whiskers[plural] (old-fashioned or humorous)
the hair growing on a man’s face, especially on the sides of his face 络腮胡子；连鬓胡子
Word Originlate Middle English (originally denoting a bundle of feathers, twigs, etc., used for whisking): from the verb whisk + -er.
Idioms
be the cat’s whiskers/pyjamas
be, come, etc. within a whisker of something/doing something
by a whisker
- (informal)
by a very small amount 差一点儿