| Acronym | Definition |
|---|
| mg | Milligram |
| MG | Myasthenia Gravis |
| MG | Morris Garages (UK sports car manufacturer) |
| MG | Machine Gun |
| MG | Manager |
| MG | Magnesium |
| MG | Minas Gerais (Brazil) |
| MG | Metal Gear (game) |
| MG | Management Group |
| MG | Medical Group |
| MG | Major General |
| MG | Mardi Gras |
| MG | Morning Glory |
| MG | Madagascar (ISO country code, top level domain) |
| MG | Mongolia |
| MG | Master Gardener |
| MG | Media Gateway (packet based telephony; between PSTN and packet network) |
| mg | Microgram |
| MG | Mel Gibson (actor/producer) |
| MG | Mixed Grain (lumber industry) |
| MG | Marvin Gaye (singer) |
| MG | Make-Good |
| MG | Mahatma Gandhi |
| MG | Magic Gate (Sony memory card DRM) |
| MG | Middle Ground (sprite comic website) |
| MG | Mean Girls (film) |
| MG | Mini-Golf |
| MG | Maschinengewehr (German: Machine Gun) |
| MG | Motor-Generator |
| MG | Match Game |
| MG | Mini-Game (gaming) |
| MG | Military Government |
| MG | Machine Gunner |
| MG | Main Gauche (accordion, left hand side) |
| MG | Matt Groening |
| MG | Milligauss |
| MG | Miniature Golf |
| MG | Milli Gazette (Indian newspaper) |
| Mg | Megagram (metric tonne) |
| MG | Monitoring Group (supervisory body) |
| MG | Marine Group |
| MG | Monster Garage (Discovery Channel) |
| MG | Metal Gate (semiconductors) |
| MG | Molecular Geometry (chemistry) |
| MG | Mini-Gun (light machine gun) |
| MG | Managing Gigabytes |
| MG | Magic Gladiator (gaming) |
| MG | Maximum Gain (antennas) |
| MG | Mongolian Grill (restaurant) |
| MG | Metallgesellschaft (Frankfurt, Germany) |
| MG | Master Gunner (UK Military) |
| MG | Machine-Glazed |
| MG | Missile Guidance (radar) |
| MG | Metre-Gauge (railway) |
| MG | Minimum Guarantee |
| MG | Main Generator |
| MG | Message Generator |
| MG | Multinational Group |
| MG | Mauser Gewehr (WWII German infantry) |
| MG | Multi-Grid (algorithm) |
| MG | Moongate (online game, now Materia Magica) |
| MG | Medal for Gallantry (Australian Defence Force) |
| MG | Menin Gate |
| mG | Miles Gloriosus (gaming clan) |
| MG | Minority Game (financial markets model) |
| MG | Maxwell-Garnett (formula) |
| MG | Marine Gunner |
| MG | Message Gateway |
| MG | Mastergroup |
| MG | Mario Guide (website) |
| MG | Mongomery Gentry (band) |
| MG | Meibion Glyndwr (Welsh) |
| MG | Morewood Gardens (Carnegie Mellon University) |
| MG | Mega Geek |
| MG | Mirovna Grupa |
| MG | Mean Grayness |
| MG | Missing Grade (various schools) |
| MG | Minister of the Gospel |