fracture /frak″chər/ [L, frangere, to break] , 1. the breaking of a part, especially of a bone or tooth. 2. a traumatic injury to a bone in which the continuity of the bone tissue is broken. A fracture is classified by the bone involved, the part of that bone, and the nature of the break, such as a comminuted fracture of the head of the tibia. See also specific types of fractures.