prəˈprīəd.ə(r)ˌship noun
1.
a. : the state or fact of being a proprietor : ownership
b. : an exclusive legal right for a definite or indefinite time to the profitable use of corporeal or incorporeal property upon agreed terms
proprietorship of a drug product
proprietorship of a copyright
2. : a holding in land
numerous small pleasant proprietorships
3. : proprietor's equity : net assets