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1. Become bony
   "The tissue ossified"
    
2. Make rigid and set into a conventional pattern
   "ossified teaching methods";
   - rigidify, petrify
    
3. Cause to become hard and bony
   "The disease ossified the tissue"

Derived forms: ossifying, ossifies, ossified

Type of: alter, change, change state, modify, stiffen, turn

Encyclopedia: Ossify