/ Dictionary / Index M mi: Meaning and Definition of Find definitions for: mi Pronunciation: (mē), [key] — n. Music. the syllable used for the third tone of a diatonic scale. (in the fixed system of solmization) the tone E. Cf.(def. 1). MI Pronunciation: [key] Michigan (approved esp. for use with zip code). MI Pronunciation: [key] myocardial infarction. mi Pronunciation: [key] mile; miles. mi. Pronunciation: [key] mile; miles. mill; mills. M.I. Pronunciation: [key] Military Intelligence. Mounted Infantry. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mi (Thesaurus) MHz MI5 Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language