Definition of "beaver" []

• A large aquatic rodent of the genus Castor, having thick brown fur, webbed hind feet, a broad flat tail, and sharp incisors adapted for gnawing bark, felling trees, and constructing dams and underwater lodges. (noun)
• The fur of this rodent. (noun)
• A top hat originally made of the underfur of this rodent. (noun)
• A napped wool fabric, similar to felt, used for outer garments. (noun)
• Vulgar Slang The female genitals. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "More recently, however, the term beaver has become slang for a woman's genitals."
• "To him a beaver is a 1/5th of a fur coat for his wife or a nice hat."
• "Though considered a pest because of the culvert-clogging dams it builds on streams, the beaver is an ally in conserving valuable wetland habitat for declining amphibian populations, a University of Alberta study shows."