1. To treat someone condescendingly and in a less than intelligent way: Mary patronized her sister by talking to her as if she were inferior or not smart at all.
2. To be a regular customer of a particular store or business: Melanie loved shopping so she patronized the local grocery shop every week!
3. To give money or other material support to someone or something, especially in the arts: Thomas loved to be involved with the local drama groups and was one of the sponsors who often patronized the theater.