Breadcrumb Home > Dictionary > Index P proprietary colony: Meaning and Definition of Find definitions for: propri'etary col'ony Pronunciation: [key] — Amer. Hist. Amer. Hist. any of certain colonies, as Maryland and Pennsylvania, that were granted to an individual or group by the British crown and that were granted full rights of self-government. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. proprietary proprietor TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: antediluvian Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language