/ Dictionary / Index R retrusion: Meaning and Definition of Find definitions for: re•tru•sion Pronunciation: (ri-tr'zhun, -shun), [key] — n. Dentistry. the act of moving a tooth backward. a condition characterized by the backward displacement of a tooth or teeth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. retrude retsina Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language