| Acronym | Definition |
|---|
| MAG | Metal Active Gas (welding) |
| MAG | Magazine |
| MAG | Massive Action Game (video game) |
| MAG | Magnetic |
| MAG | Magnitude (astronomy) |
| MAG | Magnesium |
| MAG | Magician (Everquest) |
| MAG | Mines Advisory Group (UK) |
| MAG | Motorcycle Action Group |
| MAG | MagLite (Flashlight) |
| MAG | Memorandum of Agreement (document) |
| MAG | Magister |
| MAG | Magister (degree) |
| MAG | Maricopa Association of Governments |
| MAG | Medical Association of Georgia (Atlanta) |
| MAG | Magnetometer |
| MAG | Mines Advisory Group (humanitarian demining NGO, UK) |
| MAG | Memorial Art Gallery (University of Rochester) |
| MAG | Ministerio de Agricultura y Ganaderia (Ecuador) |
| MAG | Martial Arts Group (insurance) |
| MAG | Myelin-Associated Glycoprotein |
| MAG | Manchester Airport Group (UK) |
| MAG | Military Advocate General (Israel) |
| MAG | Military, Aerospace and Government |
| MAG | Dotmobi Advisory Group |
| MAG | Morton Ann Gernsbacher (psychology) |
| MAG | Macally Mace Group (various locations) |
| MAG | Men's Artistic Gymnastics |
| MAG | Modeling and Analysis Group (various organizations) |
| MAG | Museums, Archives and Galleries |
| MAG | Managed Access Gateway (Exostar) |
| MAG | Mobile Access Gateway |
| MAG | Monitor Action Group (Namibia) |
| MAG | Management Advisory Group |
| MAG | Maximum Available Gain |
| MAG | Mitrailleuse d'Appui General (Belgian machine gun) |
| MAG | Master of Agriculture |
| MAG | Minimum Annual Guarantee |
| MAG | Manga, Anime and Game |
| MAG | Midwest Air Group, Inc. |
| MAG | Mid-Atlantic Group (Hardy Plant Society) |
| MAG | Mothers Against Guns (England) |
| MAG | Military Airlift Group |
| MAG | Mothers and Men against Gangs (California) |
| MAG | Metal Arc Gas (welding) |
| MAG | Maximum Absorption Garment (NASA, astronaut diaper) |
| MAG | Madang, Papua New Guinea - Madang (Airport Code) |
| MAG | Mainzer Aufbaugesellschaft mbH |
| MAG | Mission Assurance Guidelines |
| MAG | Madares al Ghad (Schools of Tomorrow; educational program; United Arab Emirates) |
| MAG | Microwave Application Group |
| MAG | Maritime Action Group |
| MAG | Mutual Assistance Group |
| MAG | Middle Aged Gamers (gaming clan) |
| MAG | Military Accountant General |
| MAG | Metropolitan Area Gateway |
| MAG | Master of Applied Geography |
| MAG | Mouvement pour les Assises de la Gauche (French: Mouvement for the Conference of the Left, Senegal) |
| MAG | Military Advisory/Assistance Group |
| MAG | Major Accounts Group |
| MAG | Mission Area Group |
| MAG | Message Assessment Group |
| MAG | Marine Aircraft/Air Group |
| MAG | Marine Activity Group |
| MAG | MNC Allotment Group |
| MAG | Marine Activity Group (TWG/TAT-14) |
| MAG | minimum allowed gain |