| Acronym | Definition |
|---|
| TRRA➣Terminal Railroad Association (of St. Louis) |
| TRRA➣Three Rivers Rowing Association (Pittsburgh, Pennsylvania) |
| TRRA➣Toronto Region Research Alliance (Canada) |
| TRRA➣The Ranger Regiment Association |
| TRRA➣Taxpayer Refund and Relief Act of 1999 (US) |
| TRRA➣Texas River Recreation Association |
| TRRA➣Three River Rowing Association (Pittsburgh, Pennsylvania) |
| TRRA➣Tax Relief Reconciliation Act of 2003 (US) |
| TRRA➣Tilt Rotor Research Aircraft |
| TRRA➣training resource requirements analysis |
| TRRA➣tumor/tissue-restricted replicative adenovirus |