/ Dictionary / Index R Russian Soviet Federated Socialist Republic: Meaning and Definition of Find definitions for: Rus'sian So'viet Fed'erated So'cialist Repub'lic Pronunciation: [key] former name (1918–91) of theAbbr.: RSFSR, R.S.F.S.R. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Russian roulette Russian thistle Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language