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

     

    certify

     verb
    verb
    BrE BrE//ˈsɜːtɪfaɪ//
     
    ; NAmE NAmE//ˈsɜːrtɪfaɪ//
     
    Verb Forms present simple I / you / we / they certify
    BrE BrE//ˈsɜːtɪfaɪ//
     
    ; NAmE NAmE//ˈsɜːrtɪfaɪ//
     
    he / she / it certifies
    BrE BrE//ˈsɜːtɪfaɪz//
     
    ; NAmE NAmE//ˈsɜːrtɪfaɪz//
     
    past simple certified
    BrE BrE//ˈsɜːtɪfaɪd//
     
    ; NAmE NAmE//ˈsɜːrtɪfaɪd//
     
    past participle certified
    BrE BrE//ˈsɜːtɪfaɪd//
     
    ; NAmE NAmE//ˈsɜːrtɪfaɪd//
     
    -ing form certifying
    BrE BrE//ˈsɜːtɪfaɪɪŋ//
     
    ; NAmE NAmE//ˈsɜːrtɪfaɪɪŋ//
     
     
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  1. 1(formal) to state officially, especially in writing, that something is true certify (that)… He handed her a piece of paper certifying (that) she was in good health. This (= this document) is to certify that… certify somebody/something + adj. He was certified dead on arrival. certify somebody/something (as) something The accounts were certified (as) correct by the finance department. certify somebody/something to be/do something The plants must be certified to be virus free.
  2. 2[usually passive] certify somebody (as something) to give somebody an official document proving that they are qualified to work in a particular profession
  3. 3[usually passive] certify somebody (+ adj.) (law) to officially state that somebody is mentally ill, so that they can be given medical treatment Patients must be certified before they can be admitted to the hospital.
  4. Word Origin Middle English: from Old French certifier, from late Latin certificare, from Latin certus ‘certain’.Extra examples I was certified as a teacher in 1989. The accounts were certified as correct by the finance department. This is to certify that…
See the Oxford Advanced American Dictionary entry: certify