something that confirms, as a corroborative statement or piece of evidence:
His birth certificate served as confirmation of his citizenship.
a rite administered to baptized persons, in some churches as a sacrament for confirming and strengthening the recipient in the Christian faith, in others as a rite without sacramental character by which the recipient is admitted to full communion with the church.
a solemn ceremony among Reform and certain Conservative Jews that is held in the synagogue, usually on Shavuoth, to admit formally as adult members of the Jewish community Jewish boys and girls 14 to 16 years of age who have successfully completed a prescribed course of study in Judaism.
c.1300, confyrmacyoun, the Church rite, from O.Fr. confirmation (13c.), from L. confirmationem, noun of action from confirmare (see confirm). Aa a legal action, from late 14c.; as "action of making sure," from c.1480.