[ I or T ] to say in a formal or official way, usually in writing, that something is true or correct(通常以书面形式)证明,证实
[ + (that) ] I hereby certify (that) the above information is true and accurate.兹证明上述情况属实准确无误。 [ + noun/adj ] The driver was certified (as) dead on arrival at the hospital.刚送到医院,司机就被证实已经死亡。 The meat has been certified (as) fit for human consumption.已证实该肉品适合人食用。
[ T ] to say officially that someone is mentally ill正式证明…患有精神病
As a young man, he had been certified and sent to a hospital for the mentally ill.他年轻时被证明患有精神病,并被送到了精神病院。