confirm Definition

confirm
verb confirmed, confirming

1. To provide support for the truth or validity of something.

Example: refused to confirm or deny the rumour
Thesaurus: prove, verify, substantiate, validate, authenticate; strengthen, support, augment, corroborate.
2. To finalize or make definite (a booking, arrangement etc).
3. Said of an opinion, etc: to strengthen it or become more convinced in it.
4. To give formal approval to something; to establish officially.

Example: His appointment was confirmed at the interview
Thesaurus: ratify, approve, sanction, affirm, endorse.
5. Christianity.
To accept someone formally into full membership of the Church.

Derivative: confirmative
adj

Derivative: confirmatory

Giving additional strength to, eg an argument, etc.

Confirming.

Etymology: 13c: from Latin confirmare, from firmare to strengthen, from firmus firm.