| Acronym | Definition |
|---|
| ARR | All Rights Reserved |
| ARR | Arrangement |
| ARR | Arrival |
| ARR | Arrive |
| ARR | Arrange |
| ARR | Alaska Railroad |
| ARR | Absolute Risk Reduction |
| ARR | Accounting Rate of Return |
| ARR | Average Room Rate (hotel Industry) |
| ARR | A.R. Rahman (Indian composer) |
| ARR | Annual Revenue Requirement |
| ARR | Almost Ready to Run (R/C kits) |
| ARR | Andøya Rocket Range |
| ARR | Autoritatea Rutiera Romana (Romanian Road Authority) |
| ARR | Academy of Radiology Research (Washington, DC) |
| ARR | Artist's Resale Right (EC intellectual property right) |
| ARR | Automatic Repeat Request |
| ARR | Ageing Research Reviews |
| ARR | Arizona Road Racers |
| ARR | Annual Resident Review |
| ARR | Association for Radiation Research (UK) |
| ARR | Assessment, Recording and Reporting (UK schools) |
| ARR | Annual Replacement Rate |
| ARR | Audit and Risk Review |
| ARR | Albany River Rats (hockey team) |
| ARR | Average Room Rent |
| ARR | Admissions, Recruitment and Registrar's Office (McGill University office) |
| ARR | Automatic Re-Routing |
| ARR | Annual Recurring Revenue |
| ARR | Axel Roxas Reno (dolls) |
| ARR | Attributes for Representing Relationships |
| ARR | American River Recreation (Lotus, CA) |
| ARR | Airborne Radio Receiver |
| ARR | Alert Readiness Rate |
| ARR | Attack Relevance Rating (Cisco) |
| ARR | Association for Regulatory Reform |
| ARR | Anno Regni Regis/Reginae (in the year of the king/queen's reign) |
| ARR | Allowance Requirements Registers |
| ARR | Adult Employment Retention Rate |
| ARR | Acceptable Risk Range |
| ARR | Availability Readiness Review (US Navy) |
| ARR | Airborne Reference Radar |
| ARR | Assemble Test and Launch Operations (ATLO) Readiness Review (NASA) |
| ARR | Anti-Repeat Relay |
| ARR | Asteroid Radar Research |
| ARR | Armour Research Reactor |
| ARR | Antenna Rotation Rate |
| ARR | Army Readiness Regions |
| ARR | Average Reward Rate |
| ARR | Army Retail Requirements |
| ARR | Acquisition Requirements Record |
| ARR | Annual Recurring Requirement |
| ARR | Abingdon Rough Riders (San Francisco, CA) |
| ARR | Active Rebuilders and Restorers |