Webster's Revised Unabridged Dictionary · 1913

Nap

Nap (nap) , intransitive verb

[Old English nappen, Anglo-Saxon hnappian to take a nap, to slumber; compare Anglo-Saxon hnipian to bend one's self, Icelandic hnipna, hnīpa, to droop.]

1.
To have a short sleep; to be drowsy; to doze. — Chaucer
2.
To be in a careless, secure state; to be unprepared; as, to be caught napping. — Wyclif
I took thee napping, unprepared. — Hudibras

Nap , noun

A short sleep; a doze; a siesta. — Cowper

Nap , noun

[Old English noppe, Anglo-Saxon hnoppa; akin to Dutch nop, Danish 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.
The loops which are cut to make the pile, in velvet. — Knight

Nap , transitive verb

To raise, or put, a nap on.

Nap , noun

Same as Napoleon, 1, below.