con ‧ fir ‧ ma ‧ tion AC /ˌkɒnfəˈmeɪʃ ə n $ ˌkɑːnfər-/ BrE AmE noun [uncountable and countable]
[ Word Family: verb : ↑ confirm ; noun : ↑ confirmation ; adjective : ↑ confirmed ≠ ↑ unconfirmed ]
1 . a statement, document etc that says that something is definitely true
confirmation of
There has still been no official confirmation of the report.
confirmation that
verbal confirmation that payment has been made
2 . a letter etc that tells you that an arrangement, date, time etc is now definite:
Most hotels require confirmation from a prospective guest in writing.
3 . a religious ceremony in which someone is made a full member of the Christian church