The Collaborative International Dictionary of English v.0.48:

Ouse \Ouse\ ([oo^]z), n. & v.
   See Ooze. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

Ouse
    n 1: a river in northeastern England that flows generally
         southeastward to join the Trent River and form the Humber
         [syn: Ouse, Ouse River]