Definition of "Hair" :
noun: a filamentous projection or process on an organism
noun: cloth woven from horsehair or camelhair; used for upholstery or stiffening in garments
noun: any of the cylindrical filaments characteristically growing from the epidermis of a mammal
"There is a hair in my soup."
noun: a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss
"He combed his hair."
noun: filamentous hairlike growth on a plant
noun: a very small distance or space
"They escaped by a hair's-breadth."