| Acronym | Definition |
|---|
| RHR | Ryan Hunter-Reay (racecar driver) |
| RHR | Royapettah High Road (India) |
| RHR | Retail Human Resources (various locations) |
| RHR | Regional Haze Rule (US EPA) |
| RHR | Rector-Hayden Realtors (Kentucky) |
| RHR | Resting Heart Rate |
| RHR | Rabbis for Human Rights (Israel) |
| RHR | Residual Heat Removal (nuclear power) |
| RHR | Revue de l'Histoire des Religions (French: Journal of the History of Religions; est. 1880) |
| RHR | Right Hand Rule (physics) |
| RHR | Royal Highland Regiment (Black Watch) |
| RHR | Right Hand Reverse (door opening convention) |
| RHR | Rate of Heat Release |
| RHR | Recruitment, Hiring and Retention (various organizations) |
| RHR | Roller Hockey Reims (French roller hockey club) |
| RHR | Roughness Height Rating (chemical milling) |
| RHR | Radio Horizon Range |
| RHR | Road Hockey Rumble (TV Show) |
| RHR | Reversed Hazard Rate (mathematics) |
| RHR | Rear Head-Rests (automotive classified) |
| RHR | Remote Hit Ratio |