- proprietary - protected by trademark or patent or copyright; made or produced or distributed by one having exclusive rights; "`Tylenol' is a proprietary drug of which `acetaminophen' is the generic form"
Antonyms: nonproprietary, generic, unpatented
- proprietorship, proprietary - an unincorporated business owned by a single person who is responsible for its liabilities and entitled to its profits
--1 is a kind of ownership