Read the dictionary definition of hair. All definitions for this word.
1. a filamentous projection or process on an organism
2. cloth woven from horsehair or camelhair; used for upholstery or stiffening in garments
3. any of the cylindrical filaments characteristically growing from the epidermis of a mammal
1. there is a hair in my soup
4. 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
1. he combed his hair
2. each hair consists of layers of dead keratinized cells
5. filamentous hairlike growth on a plant
1. peach fuzz
6. a very small distance or space
1. they escaped by a hair's-breadth
2. they lost the election by a whisker