Breadcrumb Home > Dictionary > Index M Mississauga: Meaning and Definition of Find definitions for: Mis•sis•sau•ga Pronunciation: (mis"u-sô'gu), [key] — n. a city in SE Ontario, in S Canada, on the SW shore of Lake Ontario: suburb of Toronto. 315,056. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. missish Mississippi ✖ Related Content Daily Word Quiz: hortatory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language