| Acronym | Definition |
|---|
| MTRA➣Monster Truck Racing Association |
| MTRA➣Money Transmitter Regulators Association |
| MTRA➣Medical Technical Research Associates (San Bruno, CA) |
| MTRA➣Medizinisch Technische Radiologie Assistentinnen |
| MTRA➣Michigan Therapeutic Recreation Association |
| MTRA➣Minnesota Trail Riders Association |
| MTRA➣Marion Therapeutic Riding Association, Inc. |
| MTRA➣Midwest Trail Riders Association |
| MTRA➣Motorcycle Trail Riding Association |
| MTRA➣Model Thoroughbred Racing Association |
| MTRA➣Military Temporary Reserved Airspace |
| MTRA➣Manitoba Therapeutic Recreation Association (Canada) |
| MTRA➣Multiple Tenancies Rentable Area |