verb (used with object), ossified, ossifying.
1. to convert into or cause to harden like bone.
verb (used without object), ossified, ossifying.
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.
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Origin: 1705-15; < Latin ossi- (stem of os) bone + -fy
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