ossified; ossifying
Definition of ossify
1
: to change into bone
The cartilages ossified with age.
2
: to become hardened or conventional and opposed to change
so easy for the mind to ossify and generous ideals to end in stale platitudes— John Buchan
1
: to change (a material, such as cartilage) into bone
ossified tendons of muscle
2
: to make rigidly conventional and opposed to change
ossified institutions ossified ideologies
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Merriam-Webster unabridged
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Time Traveler for ossify
The first known use of ossify was in 1699
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