/ Dictionary / Index P proprio-: Meaning and Definition of Find definitions for: proprio- Pronunciation: [key] a combining form meaning “one's own,” used in the formation of compound words: proprioceptive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propriety proprioception Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language