/ Dictionary / Index M Michaelmas: Meaning and Definition of Find definitions for: Mich•ael•mas Pronunciation: (mik'ul-mus), [key] — n. Chiefly Brit. a festival celebrated on September 29 in honor of the archangel Michael. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: michaelmas (Thesaurus) Michael VIII Palaeologus Michaelmas daisy Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language