/ Dictionary / Index R reverse fault: Meaning and Definition of Find definitions for: reverse' fault' Pronunciation: [key] — Geol. Geol. a fault in which the rock above the fault plane is displaced upward relative to the rock below the fault plane (opposed to gravity fault). Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. reverse English reverse mortgage Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language