Breadcrumb Home > Dictionary > Index R regr.: Meaning and Definition of Find definitions for: regr. Pronunciation: [key] registrar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. regorge regrate ✖ Related Content Daily Word Quiz: shanghai Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language