confirm · verb /kənˈfɜrm/Full view
Nouns: confirmation
Adjectives: confirmed, unconfirmed
Verbs: confirm
confirm (MAKE ARRANGEMENT CERTAIN)
B1 I or T to make an arrangement or meeting certain, often by telephone or in writing
Dictionary examples:

Six people have confirmed that they will be attending and ten haven't replied yet.

Flights should be confirmed 48 hours before departure.

I've accepted the job over the phone, but I haven't confirmed in writing yet.

Learner example:

I just want to confirm that we're going to the ABC cinema tonight. (Preliminary English Test; B1; Chinese)

confirm (PROVE TRUE)
B2 T to say or show that something is true
Dictionary examples:

His wife confirmed that he had left the house that morning.

The leader's speech was impressive and confirmed her faith in the party.

Learner example:

Besides, it was confirmed by scientists that consum[er]ism may develop [in]to a compulsion. (First Certificate in English; B2; Portuguese)

Cambridge logo