noun

• (countable) A semiaquatic rodent of the genus Castor, having a wide, flat tail and webbed feet, native to the Northern Hemisphere.
  "Then, for the safeguard of his personage, He did appoint a warlike equipage Of foreign beasts, not in the forest bred, But part by land and part by water fed; For tyranny is with strange aid supported. Then unto him all monstrous beasts resorted Bred of two kinds, as Griffons, Minotaurs, Crocodiles, Dragons, Beavers, and Centaurs: With those himself he strengthened mightily, That fear he need no force of enemy."
• (countable) A hat, of various shapes, made from a felted beaver fur (or later of silk), fashionable in Europe between 1550 and 1850.
  "a broad beaver slouched over his eyes"
• (Canada, US) Beaver pelts as an article of exchange or as a standard of value.
• (countable, backgammon) 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.

verb

• (logging, slang) To cut a continuous ring around a tree that one is felling.
• (backgammon) After being doubled, to immediately double the stakes again, a move that keeps the doubling cube on one’s own side of the board.
• (slang) To spot a beard in a game of beaver.
  "Beavering of foreign visitors does not count. This is a rule, but it is never carried out."

name

• (countable) A surname.

noun

• (originally Canada) A member of the youngest wing of the Scout movement, composed of groups for children, traditionally boys, of approximately five to seven years of age.