(of a person) firmly established in a particular habit, belief, or way of life and unlikely to change their ways

a confirmed bachelor

a confirmed teetotaller

establish the truth or correctness of (something previously believed or suspected to be the case)

if these fears are confirmed, the outlook for the economy will be dire

the report confirms that a diet rich in vitamin C can help to prevent cataracts

administer the religious rite of confirmation to

he had been baptized and confirmed