| Acronym | Definition |
|---|
| TRR | Test Readiness Review |
| TRR | Transportation Research Record (Journal) |
| TRR | Towarzystwo Rozwoju Rodziny (Polish: Society for Family Development) |
| TRR | Total Rate of Return |
| TRR | Target Ranging Radar |
| TRR | Transaction Reply Report |
| TRR | Théâtre Romain Rolland (French theater) |
| TRR | Tears Run Rings (band) |
| TRR | Trail Ridge Road (Rocky Mountain National Park, Colorado, USA) |
| TRR | Total Recordable Rate (OSHA) |
| TRR | Total Radioactive Residue (food science) |
| TRR | Taiwan Research Reactor (research reactor sold to Taiwan in 1969 by AECL; closed in 1980s) |
| TRR | Time Resolved Reflectivity |
| TRR | Time to Reliably Replenish |
| TRR | Teheran Research Reactor |
| TRR | Technical Readiness Review |
| TRR | Tuckerton Railroad (New Jersey) |
| TRR | Test Requirements Review |
| TRR | Tactical Range Recorder |
| TRR | Test Result Report |
| TRR | Temple Reading Room (Rugby School Library, Warwickshire) |
| TRR | Thermal Radiator Rotation |
| TRR | Trinity Rack (Korg) |
| TRR | Team Ram Rod (gaming) |
| TRR | Test and Research Reactor |
| TRR | Tidewater Rabbit Rescue |
| TRR | Test Requirements Report |
| TRR | The Reed Review (website) |
| TRR | Temporary Residence Records |
| TRR | Tachycardic Rate and Rhythm |
| TRR | Training Requirements Report |
| TRR | Total Effort Reduction Ratio |
| TRR | Trees, Rocks, and Ruins (Stargate SG-1 TV show) |
| TRR | Tarification Routière de Référence (French: Road Pricing Reference; transport cost) |
| TRR | Time-Resolved Radiography |
| TRR | Turbine Runback Relay |
| TRR | Transient Reward Rate |
| TRR | Toowoomba Road Runners (Australia) |
| TRR | Transmission Requested Range |
| TRR | Training Resource Requirement |
| TRR | Total Recall Reports |
| TRR | ThunderRockRadio (online classic rock radio station) |
| TRR | Toilet Ring Remover (cleaning product) |
| TRR | The Rittenhouse Review (Philadelphia, PA) |
| TRR | Tree-Ring Research |
| TRR | The Royal Rogues (gaming clan) |