| Acronym | Definition |
|---|
| TMAG➣Tasmanian Museum and Art Gallery (Australia) |
| TMAG➣The Morning After Girls (band) |
| TMAG➣Testability Management Action Group |
| TMAG➣Trilateral Monitoring and Assessment Group (est. 1997) |
| TMAG➣Transfusion Medicine Advisory Group (Canada) |
| TMAG➣Technical Modeling and Analysis Group (Trinity River Restoration Program; Weaverville, CA) |