(1):

(n.) The claw of a predaceous bird or animal, especially the claw of a bird of prey.

(2):

(n.) One of certain small prominences on the hind part of the face of an elephant's tooth.

(3):

(n.) The shoulder of the bolt of a lock on which the key acts to shoot the bolt.

(4):

(n.) A kind of molding, concave at the bottom and convex at the top; - usually called an ogee.