1. be a regular customer or client of

e.g. We patronize this store
Our sponsor kept our art studio going for as long as he could

Synonym: patronizepatronagesupportkeep going

2. treat condescendingly

Synonym: patronizecondescend

3. assume sponsorship of

Synonym: sponsorpatronize

4. do one's shopping at
do business with
be a customer or client of

Synonym: patronizeshopshop atbuy atfrequentsponsor