/ Dictionary / Index O ORuss: Meaning and Definition of Find definitions for: ORuss Pronunciation: [key] Old Russian. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Oruro ORV Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language