confirm con‧firm [kənˈfɜːm ǁ -fɜːrm] verb [transitive]
1. to say or show that something is definitely true:

• The company said the report confirmed what its own directors and accountants had already established.

confirm that

• Walsh confirmed that the money had been paid.

2. to tell someone that a possible arrangement, date, or time is now definite:

• Could you confirm the dates we discussed?

• I am writing to confirm our order for a 500mm print.

• If a confirmed booking is cancelled a 50% fee will be charged.

— confirmation noun [uncountable] :

• The bank has to receive confirmation that the check has cleared.

* * *

confirm UK US /kənˈfɜːm/ verb
[I or T] to make an arrangement or meeting certain, often by phone or writing: confirm that »

So far ten people have confirmed that they will be attending the meeting.


When initial appointments are made over the telephone, these should also be confirmed in writing.


No contract exists until the company confirms by email that their order has been dispatched.


The group said it expected another $5 billion of orders to be confirmed soon.

[T] to prove or say that something is true: »

Britain's biggest dairy company yesterday confirmed 3,450 job losses.


They refused to confirm or deny speculation that the company was to close.

confirmation noun [C or U]

It is essential to obtain confirmation in writing.

confirmation that »

Investors are looking for confirmation that the economy is picking up speed.

Financial and business terms. 2012.