| Acronym | Definition |
|---|
| MHR | Ministry of Human Rights (various locations) |
| MHR | McGraw-Hill Ryerson (Canadian publisher) |
| MHR | Maximum Heart Rate |
| MHR | Mid-Hants Railway (heritage railway; Hampshire, UK) |
| MHR | Meridian High Resolution |
| MHR | Magnum Hunter Resources (gas and oil company; Houston, TX) |
| MHR | Maternal Heart Rate |
| MHR | Medical Hair Restoration |
| MHR | Marvel Heroic Roleplaying (gaming) |
| MHR | Mori Hills Reit (Japan) |
| MHR | Mike Hailwood Replica (model of Ducati motorcycle) |
| MHR | Mobile Home Residential (zoning) |
| MHR | Many Happy Returns |
| MHR | Missouri Historical Review (State Historical Society of Missouri) |
| MHR | Member of the House of Representatives |
| MHR | Manual Handling Regulations (UK) |
| MHR | Mental Health Rehabilitation |
| MHR | Malossi Hyper Racing (Italy) |
| MHR | Multiple Head Registration |
| MHR | Mean Hull Roughness (sailing) |
| MHR | Master of Human Relations |
| MHR | Maternal High Risk (program; various locations) |
| MHR | Max Headroom (TV show) |
| MHR | Michigan House Republicans |
| MHR | Manhours |
| MHR | Maritime Heritage Resources |
| MHR | Mile High Resistance |
| MHR | Medical and Health Research |
| MHR | Murder House Records (band) |
| MHR | Medical History Review |
| MHR | Multi-Hop Relay |
| MHR | Mass Hysteria Records |