/ Dictionary / Index R Russian Orthodox Church: Meaning and Definition of Find definitions for: Rus'sian Or'thodox Church' Pronunciation: [key] the autocephalous Eastern Church in Russia: the branch of the Orthodox Church that constituted the established church in Russia until 1917. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Russian olive Russian Revolution Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language