[ pruh-prahy-i-ter-ee ]
/ prəˈpraɪ ɪˌtɛr i /


noun, plural pro·pri·e·tar·ies.

Origin of proprietary

1400–50; late Middle English (noun) <Medieval Latin proprietārius owner, noun use of Late Latin: of an owner, of ownership. See propriety, -ary

OTHER WORDS FROM proprietary

pro·pri·e·tar·i·ly [pruh-prahy-i-tair-i-lee, -prahy-i-ter-], /prəˌpraɪ ɪˈtɛər ɪ li, -ˈpraɪ ɪˌtɛr-/, adverbnon·pro·pri·e·tar·y, adjective, noun, plural non·pro·pri·e·tar·ies. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for proprietary

British Dictionary definitions for proprietary

/ (prəˈpraɪɪtərɪ, -trɪ) /


of, relating to, or belonging to property or proprietors
privately owned and controlled
med of or denoting a drug or agent manufactured and distributed under a trade nameCompare ethical (def. 3)

noun plural -taries

Derived forms of proprietary

proprietarily, adverb

Word Origin for proprietary

C15: from Late Latin proprietārius an owner, from proprius one's own
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for proprietary

[ prə-prīĭ-tĕr′ē ]


Exclusively owned, as of a hospital.
Owned by an individual or corporation under a trademark or patent, as of a drug.


A proprietary medicine.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.