Breadcrumb Home > Dictionary > Index R regolith: Meaning and Definition of Find definitions for: reg•o•lith Pronunciation: (reg'u-lith), [key] — n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. regnat populus* regorge ✖ Related Content Daily Word Quiz: triumphalism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language