/ Dictionary / Index M Mirim: Meaning and Definition of Find definitions for: Mi•rim Pronunciation: (mi-rim' Port. mi-rēn'), [key] a lake on the E Uruguay-S Brazil border. ab. 108 mi. (174 km) long. Spanish, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Miriam mirk Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language