/ Dictionary / Index C church mode: Meaning and Definition of Find definitions for: church' mode" Pronunciation: [key] — Music. Music. a mode belonging to a codified system of modes in use in Gregorian chant and in other music to c1600. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. church militant Church of Christ, Scientist Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language