The Collaborative International Dictionary of English v.0.48:

Snooze \Snooze\ (sn[=oo]z), n. [Scot. snooze to sleep; cf. Dan.
   & Sw. snus snuff.]
   A short sleep; a nap. [Colloq.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snooze \Snooze\, v. i. [imp. & p. p. Snoozed; p. pr. & vb. n.
   Snoozing.]
   To doze; to drowse; to take a short nap; to slumber.
   [Colloq.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

snooze
    n 1: sleeping for a short period of time (usually not in bed)
         [syn: nap, catnap, cat sleep, forty winks, short
         sleep, snooze]
    v 1: sleep lightly or for a short period of time [syn: snooze,
         drowse, doze]