| Abbreviation | Definition |
|---|---|
| MSV | Medical Society of Virginia |
| MSWC | Maharashtra State Women's Council |
| MSWC | Men in Social Work Caucus |
| MTA | Muay Thai Association |
| MTA | The Metropolitan Transit Association |
| MTCC | Maldives Transport and Contracting Company plc. |
| MTPA | Middle Tennessee Paralegal Association |
| MTPA | Middle Tennessee Pullers Association |
| MUA | Mediterranean Urological Association |
| MURA | Muslim Relief Association |
| MVA | Mississippi Valley Association |
| MVFA | McMinnville Volunteer Fire Association |
| MVNE | Mobile Virtual Network Enabler |
| MWA | Metec West Africa |
| MWAB | Maryland Writers' Association, Baltimore |
| MWAZ | Medical Women's Association of Zambia |
| MWLB | Marshall Women's Leadership Board |
| MWN | Musician`s Worldwide Network |
| MWPA | Maine Wood Products Association |
| MWPA | Maine Writers Publishers Alliance |