[hair] 
| 1. | any of the numerous fine, usually cylindrical, keratinous filaments growing from the skin of humans and animals; a pilus. |
| 2. | an aggregate of such filaments, as that covering the human head or forming the coat of most mammals. |
| 3. | a similar fine, filamentous outgrowth from the body of insects, spiders, etc. |
| 4. | Botany. a filamentous outgrowth of the epidermis. |
| 5. | cloth made of hair from animals, as camel and alpaca. |
| 6. | a very small amount, degree, measure, magnitude, etc.; a fraction, as of time or space: He lost the race by a hair. |
| 7. | get in someone's hair, Slang. to annoy or bother someone: Their snobbishness gets in my hair. |
| 8. | hair of the dog, Informal. a drink of liquor, supposed to relieve a hangover: Even a hair of the dog didn't help his aching head. Also, hair of the dog that bit one. |
| 9. | let one's hair down, Informal.
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| 10. | make one's hair stand on end, to strike or fill with horror; terrify: The tales of the jungle made our hair stand on end. |
| 11. | split hairs, to make unnecessarily fine or petty distinctions: To argue about whether they arrived at two o'clock or at 2:01 is just splitting hairs. |
| 12. | tear one's hair, to manifest extreme anxiety, grief, or anger: He's tearing his hair over the way he was treated by them. Also, tear one's hair out. |
| 13. | to a hair, perfect to the smallest detail; exactly: The reproduction matched the original to a hair. |
| 14. | without turning a hair, without showing the least excitement or emotion. Also, not turn a hair. |
hair (hâr)
n.
Any of the cylindrical, keratinized, often pigmented filaments characteristically growing from the epidermis of a mammal.
A growth of such filaments, as that forming the coat of an animal or covering the scalp of a human.
One of the fine hairlike processes of a sensory cell.
hair (hâr) Pronunciation Key
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