The Collaborative International Dictionary of English v.0.48:

Coleslaw \Cole"slaw`\, n. [D. kool slaa cabbage salad.]
   A salad made of sliced cabbage.
   [1913 Webster]

WordNet (r) 3.0 (2006):

coleslaw
    n 1: basically shredded cabbage [syn: coleslaw, slaw]