<p><strong>Adjective:</strong></p><ul><li>belonging to a proprietor.</li><li>being a proprietor; holding property: the proprietary class.</li><li>pertaining to property or ownership: proprietary wealth.</li><li>belonging or controlled as property.</li><li>(of a brand name, product, service, formula, etc.) protected by a patent, copyright, or trademark: proprietary drugs; a proprietary name; a proprietary logo; a proprietary blend of ingredients.</li><li>privately owned and operated for profit: proprietary hospitals.</li></ul><p><strong>Noun:</strong></p><ul><li>(plural: proprietaries)<ul><li>an owner or proprietor.</li><li>a body of proprietors.</li><li>American History: the grantee or owner, or one of the grantees or owners, of a proprietary colony.</li><li>ownership.</li><li>something owned, especially real estate.</li><li>a proprietary medicine.</li><li>Also called proprietary school: a school organized as a profit-making venture primarily to teach vocational skills or self-improvement techniques.</li></ul></li></ul>