1. (n.) The act of confirming or strengthening; the act of establishing, ratifying, or sanctioning; as, the confirmation of an appointment.

2. (n.) That which confirms; that which gives new strength or assurance; as to a statement or belief; additional evidence; proof; convincing testimony.

3. (n.) A rite supplemental to baptism, by which a person is admitted, through the laying on of the hands of a bishop, to the full privileges of the church, as in the Roman Catholic, the Episcopal Church, etc.

4. (n.) A conveyance by which a voidable estate is made sure and not voidable, or by which a particular estate is increased; a contract, express or implied, by which a person makes that firm and binding which was before voidable.

John Hancock OK acceptance affirmance affirmation agape approbation approval ascertainment asperges aspersion assurance attestation auricular confession authentication authorization backing backing up baptism bar mitzvah bas mitzvah bearing out bolstering buttressing celebration certification check checking circumcision circumstantiation collation comparative scrutiny confession corroboration corroboratory evidence countersignature cross-check deep-rootedness deep-seatedness determination documentation embedment endorsement ensuring entrenchment establishment evidence extreme unction fixation fixedness fixity fixture fortification go-ahead green light high celebration holy orders implantation imprimatur incense infixion inveteracy invocation invocation of saints kiss of peace lesser litany litany love feast lustration matrimony nod notarization okay pax penance permission processional proof proving proving out ratification reassurance reassurement reciting the rosary reinforcement rubber stamp sanction seal seven sacraments sigil signature signet stabilization stamp stamp of approval strengthening subscription substantiation support supporting evidence telling of beads testament testimonial the Eucharist the confessional the confessionary the nod undergirding validation verification visa vise warrant witness