| Abbreviation | Definition |
|---|---|
| MMSA | Muslim Medical Students Association |
| MNA | Marquette Neighborhood Association |
| MNA | Merchant Navy Association |
| MNA | Michigan Negotiators Association |
| MNA | Michigan Nonprofit Association |
| MNA | Minnesota Naturalists' Association |
| MNA | Montana Nonprofit Association |
| MNA | Montana Nurses Association |
| MNAA | Metrolina Native American Association |
| MNACI | Maldives National Association of Construction Industries |
| MNACI | Maldives National Association of Construction Industry |
| MNAPABA | Minnesota Asian Pacific American Bar Association |
| MNBA | Mongolian National Basketball Association |
| MNDA | Maryland Naturopathic Doctors Association |
| MNSA | Maritime Navigation and Safety Association |
| MNSA | Maritime Navigation Safety Association |
| MNSA | Minnesota Nordic Ski Association |
| MNTF | Medlem av Den Norske Tannlegeforening (Norwegian: Member of the Norwegian Dental Association) |
| MOA | Manitoba Osteopathic Association |
| MOA | Michigan Osteopathic Association |