the hair growing on a man's face; esp., the beard on the cheeks
a hair of a man's beard
any of the long, bristly hairs growing on each side of the upper lip of a cat, rat, etc.; vibrissa
a very small, hairlike, single-crystal filament of high tensile strength, grown on certain metals, alloys, crystals, etc. and serving to reinforce the material
a very small amount or margin: to lose an election by a whisker
Naut. either of two spars extending laterally one on each side of the bowsprit, for spreading the jib and flying jib guys