From WordNet (r) 3.0 (2006):
beaver
n 1: the soft brown fur of the beaver [syn: beaver, beaver
fur]
2: a native or resident of Oregon [syn: Oregonian, Beaver]
3: a full beard
4: a man's hat with a tall crown; usually covered with silk or
with beaver fur [syn: dress hat, high hat, opera hat,
silk hat, stovepipe, top hat, topper, beaver]
5: a movable piece of armor on a medieval helmet used to protect
the lower face
6: a hat made with the fur of a beaver (or similar material)
[syn: beaver, castor]
7: large semiaquatic rodent with webbed hind feet and a broad
flat tail; construct complex dams and underwater lodges
v 1: work hard on something [syn: beaver, beaver away]