| Acronym | Definition |
|---|
| MEGA | Michigan Economic Growth Authority |
| MEGA | Molecular Evolutionary Genetics Analysis |
| MEGA | Msi Entertainment and Gaming Appliance |
| MEGA | 10 to 6 (million) |
| MEGA | Effective Methods in Algebraic Geometry (Conference) |
| MEGA | Medium Energy Gamma-ray Astronomy (telescope) |
| MEGA | Middle Educators Global Activities |
| MEGA | Municipal Electric and Gas Alliance |
| MEGA | Multidisciplinary Education in Geriatrics and Aging |
| MEGA | Microlensing Exploration of the Galaxy and Andromeda |
| MEGA | Michigan Emu Growers Association (Midland, MI) |
| MEGA | membrane electrode gasket assembly |
| MEGA | Maritime Embedded GPS (Global Positioning System) Adapter (US Navy) |
| MEGA | Maintenance, Engineering, Grants and Accounting (Iowa state government) |
| MEGA | Microlensing Exploration of the Galaxy & Andromeda |
| MEGA | Muon (decays to) an Electron and a Gamma ray (experiment) |