Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: French
Origin: certifier, from Late Latin certificare, from Latin certus; CERTAIN1

certify

verb
     
cer‧ti‧fy past tense and past participle certified, present participle certifying, third person singular certifies [transitive]
1 to state that something is correct or true, especially after some kind of test:
The accounts were certified by an auditor.
certify (that)
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.
2 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.
3MPMI to officially state that someone is mentally ill

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary