Learner's definition of CONFIRMATION
1 [noncount] : proof which shows that something is true or correct
— often + of
Reporters awaited confirmation from the army about the battle.
We don't have independent confirmation of the facts.
Final confirmation came only after the investigation was completed.
2 : a response which shows that information is received and understood especially : a response that makes a purchase, appointment, etc., definite or official
3 [noncount] : the act of giving official approval to something or someone — often used before another noun 4 : a ceremony in which someone becomes a full, adult member of a religion