confirmation

The word “confirmation” means proof or a statement that something is true or has been agreed. In plain terms, something that proves or verifies a fact, plan, or booking — or, in religion, a ceremony affirming one's faith.

“Confirmation” is pronounced kon-fuh-MAY-shuhn (/ˌkɑn.fəɹˈmeɪ.ʃən/ in IPA).

Here is “confirmation” used in a sentence: “She received an email confirmation of her flight.”

“Confirmation” is a noun.

The word “confirmation” comes from Latin. From Old French confirmacion, from Latin cōnfirmātiō, "a strengthening" — built from confirm + -ation.

“Confirmation” is a fairly common word in modern English, usually learned at around the B1 level.

“Confirmation” has 2 distinct senses listed in this dictionary. The most common is: proof or a statement that something is true or has been agreed.

Confirmation is proof or a statement that something is true or has been agreed, often supplied by another party — written confirmation of a booking, for example. Verification is the process of checking facts for accuracy yourself, so you verify a claim and receive confirmation from a source.

Confirmation bias is the tendency to notice, favor, and remember information that supports what you already believe, while overlooking evidence against it. The term builds on confirmation in the sense of proof that something is true: the mind unconsciously hunts for that proof.

Confirmation is a religious ceremony in which a person formally affirms their faith. In many Christian traditions, including Catholic and Anglican practice, it marks a mature personal commitment to the promises made at baptism and is often performed by a bishop.

Capitalization varies by sense. Religious writing usually capitalizes Confirmation when naming the rite or sacrament, while the everyday sense — confirmation of a booking, appointment, or fact — is always lowercase. When in doubt, use lowercase unless referring formally to the ceremony.