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English definition of “certify”

certify

verb [T]     /ˈsɜːtɪfaɪ/
TRUTH formal to say in a formal or official way that something is true or correct : [+ (that)] I certify that the information I have given is true . She was certified dead on arrival at the hospital .Accepting and agreeingAccepting and agreeing reluctantlyApproving and approval
CERTIFICATE to give someone a certificate to say that they have completed a course of study : a certified accountant School and vocational qualifications
HEALTH to say officially that someone has a mental illness Mental and psychiatric disorders
(Definition of certify verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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