/ Dictionary / Index M magisterium: Meaning and Definition of Find definitions for: mag•is•te•ri•um Pronunciation: (maj"u-stēr'ē-um), [key] — n. Rom. Cath. Ch. the authority and power of the church to teach religious truth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. magisterial magistery 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