Definition of hairs:
(n) :
(countable) A pigmented filament of keratin which grows from a follicle on the skin of humans and other mammals.
(n) :
(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.
(v) :
(transitive) To remove the hair from.
(v) :
(intransitive) To grow hair (where there was a bald spot).
(v) :
(transitive) To cause to have or bear hair; to provide with hair
(n) :
(countable) Any slender, flexible outgrowth, filament, or fiber growing or projecting from the surface of an object or organism.