|Origin:||certifier, from Late Latin certificare, from Latin certus; CERTAIN1|
cer‧ti‧fy past tense and past participle certified, present participle certifying, third person singular certifies [transitive]
to state that something is correct or true, especially after some kind of test:
The accounts were certified by an auditor.
We need to certify that the repairs have been satisfactorily carried out.
certify somebody dead (=when a doctor says officially that a person is dead) British English
The driver was certified dead at the scene.
to give an official paper to someone which states that they have completed a course of training for a profession [↪ certificate]
certify somebody as something
She was certified as a teacher in 1990.
to officially state that someone is mentally ill