/ Dictionary / Index M M.C.R.: Meaning and Definition of Find definitions for: M.C.R. Pronunciation: [key] Master of Comparative Religion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. McPherson McReynolds Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language