1. (

• hair

) 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. (

• hair's-breadth ,
• hairsbreadth ,
• hair ,
• whisker

) a very small distance or space; "they escaped by a hair's-breadth"; "they lost the election by a whisker" ;

3. (

• hair ,
• fuzz ,
• tomentum

) filamentous hairlike growth on a plant; "peach fuzz" ;

4. (

• hair ,
• pilus

) any of the cylindrical filaments characteristically growing from the epidermis of a mammal; "there is a hair in my soup" ;

5. (

• haircloth ,
• hair

) cloth woven from horsehair or camelhair; used for upholstery or stiffening in garments ;

6. (

• hair ,

) a filamentous projection or process on an organism ;