| Acronym | Definition |
|---|
| MRRT➣Minerals Resource Rent Tax (Australia) |
| MRRT➣Montana Rockies Rail Tours |
| MRRT➣Motoport Rockanje Racing Team (Dutch racing; Rockanje, Netherlands) |
| MRRT➣Mobile Respite Response Team (dementia service; Australia) |
| MRRT➣Maximal Rate of Rise of Torque |