Definitions of beaver:
- noun: large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges
- noun: a hat made of beaver fur or similar material
- noun: a movable piece of armor on a medieval helmet used to protect the lower face
- noun: a full beard
- noun: the soft brown fur of the beaver
- noun: a man's hat with a tall crown; usually covered with beaver or silk
- verb: work hard on something
- name: A surname (common: 1 in 14285 families; popularity rank in the U.S.: #1757)