An example of confirm is to sign an alliance agreement.
An example of confirm is to call a friend and make sure that tonight's plans are definite.
An example of confirm is to pledge devotion to a faith.
Working on the campaign confirmed her intention to go into politics.
Origin of confirm
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English, from Old French confermer, from Latin confirmāre (“to make firm, strenghten, establish”), from com- (“together”) with firmare (“to make firm”), from firmus (“firm”).