| Acronym | Definition |
|---|
| TRH | Transatlantic Holdings, Inc. (various locations) |
| TRH | Thyrotropin Releasing Hormone |
| TRH | Texas Roadhouse (restaurant chain) |
| TRH | Technical Recommendations for Highways (South Africa) |
| TRH | Theatre Royal Haymarket (UK) |
| TRH | Toilet Roll Holder (bathrooms) |
| TRH | Terapia de Reemplazo Hormonal (Spanish: available hormonal therapy) |
| TRH | Taylor Regional Hospital (Kentucky) |
| TRH | Trondheim (Norway city) |
| TRH | Their Royal Highnesses |
| TRH | Trail Riders of Houston (motorcycle club; Houston, TX) |
| TRH | Tragic Right Hip |
| TRH | Temperature/Relative Humidity |
| TRH | That Retarded Horse (World of Warcraft) |
| TRH | Timpanogos Regional Hospital (Orem, UT) |
| TRH | Total Recoverable Hydrocarbons |
| TRH | Town of Richmond Hill (Canada) |
| TRH | Tail Rotor Head (helicopters) |