verb, -fied, -fy⋅ing.| 1. | to convert into or cause to harden like bone. |
| 2. | to become bone or harden like bone. |
| 3. | to become rigid or inflexible in habits, attitudes, opinions, etc.: a young man who began to ossify right after college. |
ossify os·si·fy (ŏs'ə-fī')
v. os·si·fied, os·si·fy·ing, os·si·fies
To change into bone.