Nap, n. [OE. noppe, AS. hnoppa; akin to D. nop, Dan. noppe, LG. nobbe.] 1. Woolly or villous surface of felt, cloth, plants, etc.; an external covering of down, of short fine hairs or fibers forming part of the substance of anything, and lying smoothly in one direction; the pile; — as, the nap of cotton flannel or of broadcloth.
2. pl. The loops which are cut to make the pile, in velvet. Knight.