Source : Webster's Revised Unabridged Dictionary (1913)

Clumber \Clum"ber\ (kl[u^]m"b[~e]r), n. [Named from the estate
   of the Duke of Newcastle.] (Zo["o]l.)
   A kind of field spaniel, with short legs and stout body,
   which, unlike other spaniels, hunts silently.

Source : WordNet®

clumber
     n : a thickset spaniel with longish silky hair [syn: {clumber
         spaniel}]