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Definition of 'hair'


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

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