Definition of "Confirm" :
verb: make more firm
"Confirm thy soul in self-control!."
verb: establish or strengthen as with new evidence or facts
"His story confirmed my doubts."
verb: strengthen or make more firm
"The witnesses confirmed the victim's account."
verb: administer the rite of confirmation to
"The children were confirmed in their mother's faith."
verb: support a person for a position
"The Senate confirmed the President's candidate for Secretary of Defense."