The Collaborative International Dictionary of English v.0.48:

Nap \Nap\, n.
   A short sleep; a doze; a siesta. --Cowper.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

   2. pl. The loops which are cut to make the pile, in velvet.
      --Knight.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Nap \Nap\, v. t.
   To raise, or put, a nap on.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Nap \Nap\, n.
   Same as Napoleon, 1, below.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Nap \Nap\ (n[a^]p), v. i. [imp. & p. p. Napped (n[a^]pt); p.
   pr. & vb. n. Napping (n[a^]p"p[i^]ng).] [OE. nappen, AS.
   hn[ae]ppian to take a nap, to slumber; cf. AS. hnipian to
   bend one's self, Icel. hnipna, hn[imac]pa, to droop.]
   1. To have a short sleep; to be drowsy; to doze. --Chaucer.
      [1913 Webster]

   2. To be in a careless, secure state; to be unprepared; as,
      to be caught napping. --Wyclif.
      [1913 Webster +PJC]

            I took thee napping, unprepared.      --Hudibras.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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,
         nap]
    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, nap]
    4: sleeping for a short period of time (usually not in bed)
       [syn: nap, catnap, cat sleep, forty winks, short
       sleep, snooze]
    5: a card game similar to whist; usually played for stakes [syn:
       Napoleon, nap]
    v 1: take a siesta; "She naps everyday after lunch for an hour"
         [syn: nap, catnap, catch a wink]