/ Dictionary / Index R Roman Catholicism: Meaning and Definition of Find definitions for: Ro'man Cathol'icism Pronunciation: [key] the faith, practice, and system of government of the Roman Catholic Church. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Roman Catholic Church romance Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language