proprietary
1pro·pri·e·tary
noun \p(r)ə-ˈprī-ə-ˌter-ē\plural ; pro·pri·e·tar·ies
Definition of PROPRIETARY
: something that is used, produced, or marketed under exclusive legal right of the inventor or maker; specifically : a drug (as a patent medicine) that is protected by secrecy, patent, or copyright against free competition as to name, product, composition, or process of manufacture
Learn More About
Seen & Heard 
What made you want to look up proprietary? Please tell us where you read or heard it (including the quote, if possible).
