Source : Webster's Revised Unabridged Dictionary (1913)

Nap \Nap\, v. i. [imp. & p. p. {Napped}; p. pr. & vb. n.
   {Napping}.] [OE. nappen, AS. hn[ae]ppian to take a nap, to
   slumber; cf. AS. hnipian to bend one's self, Icel. hnipna,
   hn[=i]pa, to droop.]
   1. To have a short sleep; to be drowsy; to doze. --Chaucer.

   2. To be in a careless, secure state. --Wyclif.

            I took thee napping, unprepared.      --Hudibras.

Nap \Nap\, n.
   A short sleep; a doze; a siesta. --Cowper.

Nap \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.

Nap \Nap\, v. t.
   To raise, or put, a nap on.

Nap \Nap\, n.
   Same as {Napoleon}, 1, below.

Source : WordNet®

nap
     n 1: a period of time spent sleeping; "he felt better after a
          little sleep"; "there wasn't time for a nap" [syn: {sleep}]
     2: a soft or fuzzy surface texture
     3: the yarn (as in a rug or velvet or corduroy) that stands up
        from the weave; "for uniform color and texture tailors cut
        velvet with the pile running the same direction" [syn: {pile}]
     4: a short sleep (usually not in bed) [syn: {catnap}, {cat
        sleep}, {forty winks}, {short sleep}, {snooze}]
     5: a card game similar to whist; usually played for stakes
        [syn: {Napoleon}]
     [also: {napping}, {napped}]

nap
     v : take a siesta; "She naps everyday after lunch for an hour"
         [syn: {catnap}, {catch a wink}]
     [also: {napping}, {napped}]