to make firm or firmer; to add strength to; to establish; as, health is confirmed by exercise.-to strengthen in judgment or purpose.-to give new assurance of the truth of; to render certain; to verify; to corroborate; as, to confirm a rumor.-to render valid by formal assent; to complete by a necessary sanction; to ratify; as, to confirm the appoinment of an official; the senate confirms a treaty.-to administer the rite of confirmation to. see confirmation, 3.