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.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.See bever.