/ Dictionary / Index M Mantaro: Meaning and Definition of Find definitions for: Man•ta•ro Pronunciation: (män-tä'rô Eng. man-tär'ō, män-), [key] — n. a river in central Peru, flowing SE to the Apurímac River. ab. 360 mi. (580 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mantapa manteau Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language