GREAT RIFT VALLEY(noun) Did you mean: Synonyms Rhymes Also try: riftgreatvalleyDefinitions There is 1 meaning of the phrase Great Rift Valley. Great Rift Valley - as a noun (geology) a depression in southwestern asia and eastern africa; extends from the valley of the jordan river to mozambique; marked by geological faults Word Variations & RelationsStarts G Starts GR Starts GRE Starts GREA Ends Y Ends EY Ends LEY Ends LLEY Starts G & ends Y Starts GR & ends Y Starts G & ends EY A-Z Proximitiesgreasiness 11greasinesses 13greasing 10greasy 10great 6 Great Rift Valley great-auntgreat-nephewgreat-niecegreat-unclegreatcoat 12