Hair

1. (noun) A pigmented filament of keratin which grows from a follicle on the skin of humans and other mammals. 2. (noun) The collection or mass of such growths growing from the skin of humans and animals, and forming a covering for a part of the head or for any part or the whole body. 3. (noun) A 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. 4. (noun) A cellular outgrowth of the epidermis, consisting of one or of several cells, whether pointed, hooked, knobbed, or stellated. 5. (noun) A 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. 6. (noun) Haircloth; a hair shirt. 7. (noun) Any very small distance, or degree; a hairbreadth. 8. (noun) Complexity; difficulty; quality of being hairy 9. (verb) To remove the hair from. 10. (verb) To grow hair (where there was a bald spot). 11. (verb) To cause to have hair; to provide with hair 12. (verb) To string the bow for a violin.