n. In anatomy and zoology, the consolidation or fusion of two or more bones in one, or the union of the different parts of a bone; bony union; synosteosis: as, the ankylosis of the cranial bones one with another; the ankylosis of the different elements of the temporal bone; the ankylosis of an epiphysis with the shaft of a bone.n. In pathology, stiffness and immovability of a joint; morbid adhesion of the articular ends of contiguous bones.n. Improperly spelled anchylosis.