| Acronym | Definition |
|---|
| HRR | Henley Royal Regatta (England) |
| HRR | Heat Release Rate |
| HRR | Heart Rate Reserve |
| HRR | High Range Resolution |
| HRR | Homologous Recombination Repair (DNA) |
| HRR | Heart Rate Recovery |
| HRR | Hospital Referral Region (various states) |
| HRR | Human Rights Report (Association of On-line Press Editors) |
| HRR | Home Residency Requirement (US INS) |
| HRR | Health-Related Research |
| HRR | Human Resource Representative |
| HRR | Household Response Rate (health surveys) |
| HRR | High-Resolution Radar |
| HRR | Hierarchical Round Robin |
| HRR | High Resolution Radar |
| HRR | Hardy-Rand-Rittler (color plates used in ophthalmology) |
| HRR | Humanitarian Response Review |
| HRR | Head Rice Recovery |
| HRR | Hockey Related Revenues |
| HRR | Human Research Roadmap (US NASA) |
| HRR | Harmonic Rejection Ratio |
| HRR | Höchstrichterliche Rechtsprechung (German: Jurisprudence of the Supreme Court) |
| HRR | High Resolution Resistivity (geophysical exploration and characterization method) |
| HRR | High Ridge Resources (exploration; various locations) |
| HRR | High Ramp Rate |
| HRR | High Risk Records |
| HRR | Human Race's Run (band) |
| HRR | Health Readiness Record (US DoD) |
| HRR | Horizontal Refresh Rate |
| HRR | Helicopter Rapid Refueling Procedures |
| HRR | Health Risk Review |
| HRR | High Risk Requirement |
| HRR | Heilig Rooms Rijk (Dutch: Holy Roman Empire) |