from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. 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.
  • n. The fur of this rodent.
  • n. A top hat originally made of the underfur of this rodent.
  • n. A napped wool fabric, similar to felt, used for outer garments.
  • n. Vulgar Slang The female genitals.
  • n. Offensive & Vulgar Slang A woman or girl.
  • adj. Of or relating to a beaver or beavers: beaver fur; a beaver hat.
  • adj. Constructed by beavers: beaver dams.
  • intransitive v. To work diligently and energetically.
  • n. A piece of armor attached to a helmet or breastplate to protect the mouth and chin.
  • n. The visor on a helmet.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An aquatic rodent of the genus Castor, having a wide, flat tail and webbed feet.
  • n. A hat, of various shape, made from a felted beaver fur, fashionable in Europe between 1550 and 1850
  • n. The pubic hair and/or vulva of a woman.
  • n. The lower face-guard of a helmet.
  • n. Alternative form of bever.

from the GNU version of the Collaborative International Dictionary of English

  • n. An amphibious rodent, of the genus Castor.
  • n. The fur of the beaver.
  • n. A hat, formerly made of the fur of the beaver, but now usually of silk.
  • n. Beaver cloth, a heavy felted woolen cloth, used chiefly for making overcoats.
  • n. A man's beard.
  • n. The hair on a woman's pubic area; -- vulgar.
  • n. A woman; -- vulgar and offensive.
  • n. A person who works enthusiastically and diligently; -- used especially in the phrase eager beaver.
  • n. That piece of armor which protected the lower part of the face, whether forming a part of the helmet or fixed to the breastplate. It was so constructed (with joints or otherwise) that the wearer could raise or lower it to eat and drink.

from The Century Dictionary and Cyclopedia

  • n. A rodent quadruped, about two feet in length, of the family Castoridæ and genus Castor, C. fiber, at one time common in the northern regions of both hemispheres, now found in considerable numbers only in North America, but occurring solitary in central Europe and Asia.
  • n. The fur of the beaver.
  • n. A hat made of beaver fur.
  • n. Hence— A hat of the shape of a beaver hat, but made of silk or other material, in imitation of the fur. The modern stiff silk hat was commonly called a beaver until recently.
  • n. A glove made of beaver's fur.
  • n. A thick and warm cloth used for garments by both sexes. The thickest quality is used for overcoats.
  • Made of beaver or of the fur of the beaver: as, a beaver hat; beaver gloves.
  • See bever.
  • n. In medieval armor, originally a protection for the lower part of the face and cheeks, fixed securely to the armor of the neck and breast, and sufficiently large to allow the head to turn behind it.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. work hard on something
  • n. a full beard
  • n. large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges
  • n. a movable piece of armor on a medieval helmet used to protect the lower face
  • n. a man's hat with a tall crown; usually covered with silk or with beaver fur
  • n. a hat made with the fur of a beaver (or similar material)
  • n. the soft brown fur of the beaver
  • n. a native or resident of Oregon


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English bever, from Old English beofor.
Middle English bavier, from Old French baviere, child's bib, beaver, from bave, saliva.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Old French baviere ("child's bib"), from baver ("to slaver").

from Wiktionary, Creative Commons Attribution/Share-Alike License

Alternative forms.



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  • Usage (in the rude sense) (but still hilarious) here.

    June 19, 2009

  • Citation (in the rude sense) on kine.

    June 30, 2008

  • Beaver one, beaver all....

    June 30, 2007

  • The beaver just rocks. I'm not even worried about him.

    February 9, 2007

  • Funny, it was MY high school mascot too! Fancy that. :-D

    February 8, 2007

  • The beaver is often a mascot of institutions focusing on engineering, since the beaver is clearly natures engineer.

    February 8, 2007

  • One of the best words ever. Also my high school mascot. (A Catholic school, no less.) Go Beavers!

    February 8, 2007