Merriam-Webster's Collegiate® Dictionary, 11th Edition
NAP
I. intransitive verb (napped; napping)
Etymology: Middle English nappen, from Old English hnappian; akin to Old High German hnaffezen to doze Date: before 12th century to sleep briefly especially during the day ; doze , to be off guard,
II. noun
Date: 14th century
a short sleep especially during the day ; snooze ,
III. noun
Etymology: Middle English noppe, from Middle Dutch, flock of wool, nap
Date: 15th century
a hairy or downy surface (as on a fabric), napless adjective napped adjective
IV. transitive verb (napped; napping)
Date: 1620
to raise a nap on (fabric or leather),
V. noun
Etymology: from to go nap (to make all the points in the card game Napoleon)
Date: 1895
a pick or recommendation as a good bet to win a contest (as a horse race), V
I. transitive verb (napped; napping)
Date: 1927
to pick or single out in a nap