v. os·si·fied, os·si·fy·ing, os·si·fies
1. To change into bone; become bony.
2. To become set in a rigidly conventional pattern: "The central ideas of liberalism have ossified" (Jeffrey Hart).
1. To convert (a membrane or cartilage, for example) into bone.
2. To mold into a rigidly conventional pattern.
os·sific (ŏ-sĭfĭk) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.