/ Dictionary / Index T theorem of the mean: Meaning and Definition of Find definitions for: the'orem of the mean' Pronunciation: [key] — Math. Math. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. theorem theoretical Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language