1. confirming something: the act of verifying or ratifying something sought confirmation of his suspicions the appointment is subject to confirmation by the Senate
2. something that confirms something else: something that supports, validates, or verifies something else a confirmation of my worst fears Send written confirmation of the date of delivery.
3. christianity acceptance into church: in Christianity, a religious ceremony that marks somebody's formal acceptance into a church
4. judaism ceremony marking beginning of responsible adulthood: in Reform Judaism, a ceremony that marks the completion of somebody's religious training and entry into full adult membership of the community
