Definition of "hair" in Anglais

noun

(countable) A pigmented filament of keratin which grows from a follicle on the skin of humans and other mammals.
(uncountable) 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.
- In the western world, women usually have long hair while men usually have short hair.
(zoology, countable) 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.
(botany, countable) A 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).
(countable) Any slender, flexible outgrowth, filament, or fiber growing or projecting from the surface of an object or organism.
- (uncountable, by extension) The collection or mass of such outgrowths, filaments, or fibers growing or projecting from the surface of an object or organism.
(countable, engineering, firearms) 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.
(countable) Any very small distance, or degree; a hairbreadth.
- Just a little louder please—turn that knob a hair to the right.
(slang, uncountable) Complexity; difficulty; the quality of being hairy.
- January 2014, Barack Obama, quoted in "Going the Distance" by David Remnick, in The New Yorker Having said all that, those who argue that legalizing marijuana is a panacea and it solves all these social problems I think are probably overstating the case. There is a lot of hair on that policy.

verb

(transitive) To remove the hair from.
(intransitive) To grow hair (where there was a bald spot).
(transitive) To cause to have or bear hair; to provide with hair
To string the bow for a violin.