| Acronym | Definition |
|---|
| MTSG➣Marine Turtle Specialist Group (International Union for the Conservation of Nature and Natural Resources) |
| MTSG➣Mountains to Sound Greenway (Seattle, WA) |
| MTSG➣Manchester Trainee Solicitors Group (UK) |
| MTSG➣Muay Thai Singapore (website) |
| MTSG➣Mayo Traveller Support Group (Ireland) |
| MTSG➣Medium Term Strategy Group (Ministry of Economic Development; New Zealand) |