/ Dictionary / Index M motocross: Meaning and Definition of Find definitions for: mo•to•cross Pronunciation: (mō'tō-krôs", -kros"), [key] — n. a timed motorcycle race over a closed course consisting of a winding dirt trail with hills, jumps, sharp turns, and often muddy terrain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. moto moton Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language