/ Dictionary / Index M motorbus: Meaning and Definition of Find definitions for: mo•tor•bus Pronunciation: (mō'tur-bus"), [key] — pl. -bus•es, -bus•ses. a passenger bus powered by a motor. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: motorbus (Thesaurus) motorboating motorcade Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language