hair in WordNet English dictionary

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