n. - a any of the fine threadlike strands growing from the skin of mammals, esp. From the human head. B these collectively (has long hair).

- thing resembling a hair.

- elongated cell growing from a plant.

- very small quantity or extent (also attrib.: hair crack). get in a person's hair colloq. Annoy a person. Keep one's hair on colloq. Keep calm; not get angry. Let one's hair down colloq. Enjoy oneself by abandoning restraint. Make one's hair stand on end colloq. Horrify one. Not turn a hair remain unmoved or unaffected. hairless adj. [old english]

- of the dog n. Further alcoholic drink taken to cure the effects of drink.

- shirt n. Shirt of haircloth, worn formerly by penitents and ascetics.