The Collaborative International Dictionary of English v.0.48:

awash \a*wash"\, a. [Pref. a- + wash.]
   1. Washed by the waves or tide; -- said of a rock or strip of
      shore; or specifically: (Naut.) flush with the surface of
      the water, so that the waves break over it; -- of an
      anchor, etc.
      [1913 Webster]

   2. Abounding; filled; covered; -- used mostly with in or
      with, in phrases such as "stores awash with customers".
      [PJC]

WordNet (r) 3.0 (2006):

awash
    adj 1: covered with water; "the main deck was afloat (or
           awash)"; "the monsoon left the whole place awash"; "a
           flooded bathroom"; "inundated farmlands"; "an overflowing
           tub" [syn: afloat(p), awash(p), flooded,
           inundated, overflowing]