beaver

1. A semiaquatic rodent of the genus Castor, having a wide, flat tail and webbed feet, native to the Northern Hemisphere. (countable)
2. The fur of the beaver. (countable, uncountable)
3. A hat, of various shapes, made from a felted beaver fur (or later of silk), fashionable in Europe between 1550 and 1850. (countable)
4. Beaver pelts as an article of exchange or as a standard of value. (US, countable, uncountable)
5. Beaver cloth, a heavy felted woollen cloth, used chiefly for making overcoats. (countable, uncountable)
6. A brown colour, like that of a beaver. (countable, uncountable)
7. A move in response to being doubled, in which one immediately doubles the stakes again, keeping the doubling cube on one’s own side of the board. (countable)
8. A beard or a bearded person. (countable, slang)

Plural beavers