| Acronym | Definition |
|---|
| MMSA | Mitsubishi Motor Sales of America, Inc |
| MMSA | Malta Medical Students' Association (Malta) |
| MMSA | Mining and Metallurgical Society of America (Boulder, CO) |
| MMSA | Mercantile Marine Service Association |
| MMSA | Michigan Maple Syrup Association |
| MMSA | Manitoba Medical Students Association |
| MMSA | Multimission Surveillance Aircraft |
| MMSA | Minnesota Mine Safety Association (Eden Prairie, MN) |
| MMSA | Metropolitan & Micropolitan Statistical Areas |
| MMSA | Motion Made, Seconded, and Approved |
| MMSA | Muhammadiyah Medical Students' Activities |