v. t. [ imp. & p. p. Ossified p. pr. & vb. n. Ossifying ] [ L. os, ossis, bone + -fy: cf. F. ossifier. See Osseous. ] 1. (Physiol.) To form into bone; to change from a soft animal substance into bone, as by the deposition of lime salts. [ 1913 Webster ]
2. (Fig.): To harden; as, to ossify the heart. Ruskin. [ 1913 Webster ]