Definition of ossify verb from the Oxford Advanced Learner's Dictionary

     

    ossify

     verb
    verb
    BrE BrE//ˈɒsɪfaɪ//
     
    ; NAmE NAmE//ˈɑːsɪfaɪ//
     
    [usually passive]Verb Forms present simple I / you / we / they ossify
    BrE BrE//ˈɒsɪfaɪ//
     
    ; NAmE NAmE//ˈɑːsɪfaɪ//
     
    he / she / it ossifies
    BrE BrE//ˈɒsɪfaɪz//
     
    ; NAmE NAmE//ˈɑːsɪfaɪz//
     
    past simple ossified
    BrE BrE//ˈɒsɪfaɪd//
     
    ; NAmE NAmE//ˈɑːsɪfaɪd//
     
    past participle ossified
    BrE BrE//ˈɒsɪfaɪd//
     
    ; NAmE NAmE//ˈɑːsɪfaɪd//
     
    -ing form ossifying
    BrE BrE//ˈɒsɪfaɪɪŋ//
     
    ; NAmE NAmE//ˈɑːsɪfaɪɪŋ//
     
     
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  1. 1[intransitive, transitive, usually passive] ossify (something) (formal, disapproving) to become or make something fixed and unable to change an ossified political system
  2. 2[intransitive, transitive, usually passive] ossify (something) (specialist) to become or make something hard like bone
  3. Word Origin early 18th cent.: from French ossifier, from Latin os, oss- ‘bone’.
See the Oxford Advanced American Dictionary entry: ossify