/ Dictionary / Index R Rupes Altai: Meaning and Definition of Find definitions for: Ru•pes Al•tai Pronunciation: (r'pēz al'tī). [key] a mountain range in the fourth quadrant of the face of the moon: about 315 miles (507 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rupert rupestrine Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language