1. To join someone to another person in marriage. A noun or pronoun is used between "marry" and "to"; often used in passive constructions. I've been married to my husband for nearly 30 years. My parents wanted to marry me to the son of a wealthy business man, but I refused. It would be my honor to marry you to Charles.
2. To instill a belief or adherence to a particular belief or idea in someone. A noun or pronoun is used between "marry" and "to"; often used in passive constructions. You'll need to marry our investors to your plan if you want the funding to execute it. I wasn't married to the idea at first, but the more they explained it to me, the more convinced I became.
See also: marry