American English

Definition of certify verb from the Oxford Advanced American Dictionary



    Verb Forms present simple I / you / we / they certify
    he / she / it certifies
    past simple certified
    -ing form certifying
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  1. 1to 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. She had her farm certified organic. certify somebody/something (as) something The accounts were certified (as) correct by the finance department. certify to be/do something The plants must be certified to be virus free.
  2. 2[usually passive] certify somebody (as something) to give someone an official document proving that they are qualified to work in a particular profession He was certified as a geriatric nurse last year.
  3. 3[usually passive] certify somebody (+ adj.) (law) to officially state that someone is mentally ill, so that they can be given medical treatment Patients must be certified before they can be admitted to the hospital.
certified adjective
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See the Oxford Advanced Learner's Dictionary entry: certify