| Acronym | Definition |
|---|
| RAR | Rock Am Ring (German music festival) |
| RAR | Reading and Research |
| RAR | Retinoic Acid Receptor |
| RAR | Royal Australian Regiment |
| RAR | Resource Adapter Archive (J2EE) |
| RAR | Risk-Adjusted Return (investing) |
| RAR | Rss Archive Retrieval |
| RAR | Return Address Register |
| RAR | Resource Adapter Archive |
| RAR | Rapid Access Recording |
| RAR | Rotate Right Arithmetic |
| RAR | Route Addition Resistance |
| RAR | Rescue and Recovery |
| RAR | Réseaux Ambition Réussite (French: Ambition Success Network) |
| RAR | Runs above Replacement (baseball metric) |
| RAR | Risk Assessment Report |
| RAR | Reverse Aerial Rush (gaming) |
| RAR | Rhodesian African Rifles |
| RAR | Registrul Auto Roman (Romanian Automobile Registry) |
| RAR | Roshal Archive (WinRAR compressed file format; file extension) |
| RAR | Resource Adequacy Requirement (electricity) |
| RAR | Recommandé Avec Accusé de Reception (French: With Acknowledgment of Reception) |
| RAR | Real Aperture Radar |
| RAR | Reasonably Assured Resources |
| RAR | Rear Axle Ratio (vehicle drivetrain) |
| RAR | Revenue Agent Report (US IRS) |
| RAR | Remedial Action Report |
| RAR | Rarotonga, Cook Islands - Rarotonga (Airport Code) |
| RAR | Rapid Action Revision (US Army) |
| RAR | Riparian Areas Regulation (Canada) |
| RAR | Rapidly Adapting Receptors |
| RAR | Road Accident Rescue |
| RAR | Regulatory Asset Ratio (finance) |
| RAR | Read-After-Read |
| RAR | Resource Allocation Request |
| RAR | Remote Access Router (DSL Modem/ router) |
| RAR | Return Address Repository |
| RAR | Refill Authorization Request |
| RAR | Recorded Accomplishment Rate |
| RAR | Release After Reception (token ring, IEEE 802.5) |
| RAR | Runway Acceptance Rate |
| RAR | Refund-Anticipated Return |
| RAR | Reliability Assessment Report |
| RAR | Revise As Required |
| RAR | Report of Actual Reimbursements |
| RAR | Run At Risk |
| RAR | Rebolar A Rir (Portuguese: lauging out loud) |
| RAR | Reasonable Assurance Report (Florida Department of Environmental Protection) |
