Definitions
1.NounA pigmented filament of keratin which grows from a follicle on the skin of humans and other mammals.
2.NounThe collection or mass of such growths growing from the skin of humans and animals, and forming a covering for any part or the whole body.
3.NounSpecifically, the collection of hairs on the top and sides of the human head, growing from the scalp."In the western world, women usually have long hair while men usually have short hair."
4.NounA slender outgrowth from the chitinous cuticle of insects, spiders, crustaceans, and other invertebrates. Such hairs are totally unlike those of vertebrates in structure, composition, and mode of growth.
5.NounA cellular outgrowth of the epidermis, consisting of one or of several cells, whether pointed, hooked, knobbed, or stellated."Internal hairs occur in the flower stalk of the yellow frog lily (Nuphar)."
6.NounAny slender, flexible outgrowth, filament, or fiber growing or projecting from the surface of an object or organism." The collection or mass of such outgrowths, filaments, or fibers growing or projecting from the surface of an object or organism."
7.NounA locking spring or other safety device in the lock of a rifle, etc., capable of being released by a slight pressure on a hair-trigger.
8.NounAny very small distance, or degree; a hairbreadth."Just a little louder please—turn that knob a hair to the right.; I won by a hair."
9.NounComplexity; difficulty; the quality of being hairy.
10.VerbTo remove the hair from.
11.VerbTo grow hair (where there was a bald spot).
12.VerbTo cause to have or bear hair; to provide with hair
13.VerbTo string the bow for a violin.