1. (tr.v.) to harden and transform to a bone
2. (tr. v.) to be rigid or resist change and unconventionality
3. (intr. v.) to change a bone by hardening
4. (intr. v.) to be rigid or unconventional in beliefs and behaviour
USAGE EXAMPLE 1 : Countries that do not allow any form of free expression to their people will ossify artistically, socially and ultimately economically.
USAGE EXAMPLE 2 : Economies that do not bring out the best in people will ossify and fall behind.