| Acronym | Definition |
|---|
| MI | Michigan (US postal abbreviation) |
| MI | Mile |
| MI | Middle Initial |
| MI | Myocardial Infarction (heart attack) |
| MI | Mortgage Insurance |
| MI | More Info |
| MI | Music Industry |
| MI | Mil' (Soviet helicopter designer) |
| MI | Mission Impossible |
| MI | Monkey Island (game) |
| MI | Military Intelligence |
| MI | Malawi |
| MI | Mercer Island (Washington) |
| MI | Merritt Island (Florida) |
| MI | Mariana Islands |
| MI | Misiones (Argentina province, airline code) |
| MI | Miscellaneous (work) Item |
| MI | Market Index |
| MI | Major Issue |
| MI | Marine Institute |
| MI | Market Intelligence |
| MI | Making It |
| MI | Management Information |
| MI | Monsters, Inc. (movie) |
| MI | Motivational Interviewing (counseling/clinical psychology) |
| MI | Mentally Ill |
| MI | Shallow (METAR descriptor) |
| MI | Marine Insurance |
| MI | Mutual Information |
| MI | Multiple Intelligences |
| MI | Manhattan Institute |
| MI | Methylisothiazolinone (preservative) |
| MI | Mare Island (California) |
| MI | Mathematical Institute (various locations) |
| MI | Mathematical Induction |
| MI | Mineral Insulated |
| MI | Medical Inspection |
| MI | Management Interface |
| MI | Milken Institute |
| MI | Master Instructor |
| MI | Minority Institutions |
| MI | Malleable Iron |
| MI | Marginal Income |
| MI | Microscopic Imager |
| MI | MouseInfo (Disney) |
| MI | Medicare Interactive (health care rights information) |
| MI | Minority Interest (accounting) |
| MI | Material Inspection |
| MI | Movement Instructions (US DoD) |
| MI | Machine Intelligence |
| MI | Message Indicator |
| MI | Millennium Institute |
| MI | Master Interface (US Army) |
| MI | Medical Instrumentation |
| MI | Myo-Inositol |
| MI | Minister of Information |
| MI | Multiple Inheritance (objected oriented programming) |
| MI | Mobile Infrastructure |
| MI | Milano - Milan (Lombardia, Italy) |
| MI | Model Identification |
| MI | Microsatellite Instability |
| MI | Model Integration |
| MI | Malaysian Idol (TV series) |
| MI | Mijns Inziens (Dutch) |
| MI | Manual Input |
| MI | Machine Independent |
| MI | Maintenance Item |
| MI | Misión Internacional (Guatemala, license plates) |
| MI | Medically Indigent |
| MI | Metropolitan Institute |
| MI | Mechanical Inspection |
| MI | Memphis Industries (record label) |
| MI | Mobility Impairment |
| MI | Middle Infielder (baseball; 2nd baseman or shortstop) |
| MI | Mobile Infantry (Starship Troopers) |
| MI | Maritime Interdiction |
| MI | Measurement Interval |
| MI | Medical Investigator |
| MI | Main Injector |
| MI | Minor Irrigation (India) |
| MI | Mode Indicator |
| MI | Meat Inspector |
| MI | Mobility International, Inc (Bridgeport, MI) |
| MI | Marine Inspection (US Coast Guard) |
| MI | Master Instruction (computer instruction set) |
| MI | Mission Impact |
| MI | Management Indicator |
| MI | Marching Illini |
| MI | Modular Instruments (National Instruments) |
| MI | Manpower Information |
| MI | Malteser International (Malta) |
| MI | Mark Industries |
| MI | Market Investigation |
| MI | Multibus Interface |
| MI | Mellon Institute (building at Carnegie Mellon University) |
| MI | Monumental Inscription (burial grounds) |
| MI | Militia Immaculatae (Militia of the Immiculata) |
| MI | Master Innholder (UK) |
| MI | Mitral Incompetence (medical) |
| MI | Millennia Institute (Singapore) |
| MI | Molar to Incisor (teeth) |
| MI | Marine Instructor |
| MI | Multiple Instruction Stream |
| MI | Modification Instruction |
| MI | Metal Illumination |
| MI | Manufacturing Instruction |
| MI | Migrante International (activist group) |
| MI | Mechanical Investing |
| MI | Media Immersion |
| MI | Michel Catalog (philatelic catalog) |
| MI | Multi-Installation |
| MI | Manufacturing Inspector |
| MI | Math Investigation (education) |
| MI | Metamerism Index |
| MI | Mica Insulated |
| MI | Membership Interview |
| MI | Marginal Inscription (philately) |
| MI | Morse-Ingersoll (Beloit College Hall) |
| MI | Missed Intercept (combat aviation) |
| MI | Multiple-Instruction-Stream Computer |
| MI | Missile Item |
| MI | Mafic Index (geology) |