Miabbr. Bible MicahMIabbr.1. Michigan2. military intelligence3. myocardial infarctionmi (m?)n. Music The third tone of the diatonic scale in solfeggio.[Middle English, from Medieval Latin; see gamut.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.mi (mi?) or men (Music, other) music (in tonic sol-fa) the third degree of any major scale; mediant[C16: see gamut]MI abbreviation for 1. (Placename) Michigan 2. (Military) Military Intelligence Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014mi (mi) n. Music. the syllable used for the third tone of a diatonic scale. [1520?30; see gamut] MI 1. Michigan. 2. myocardial infarction. mi mile. mi. 1. mile. 2. mill. M.I. Military Intelligence. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.