1[countable]an animal with a wide flat tail and strong teeth. Beavers live in water and on land and can build dams (= barriers across rivers), made of pieces of wood and mud. It is an official symbol of Canada. see also eager beaver2[uncountable]the fur of the beaver, used in making hats and clothes3[countable] (taboo, slang, especially North American English) the area around a woman's sex organs