| Acronym | Definition |
|---|
| HRRL➣Hampshire Road Race League (UK) |
| HRRL➣Hard Rock Radio Live (Internet radio station) |
| HRRL➣Highland Rim Regional Library (Tennessee) |
| HRRL➣Ham Radio Repeater Locator |
| HRRL➣High Repetition Rate Laser |
| HRRL➣Hierarchical Relational Reinforcement Learning |