/ Dictionary / Index G Great Rift Valley: Meaning and Definition of Find definitions for: Great' Rift' Val'ley Pronunciation: [key] a series of rift valleys running from N to S, from the Jordan Valley in SW Asia to Mozambique in SE Africa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Great Rift Great Russian Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language