| RAR | Retinoic receptor | 维甲酸受体 |
| RAR | Read After Read | 读后读 |
| RAR | Rarotonga, Cook Islands - Rarotonga (Airport Code) | 库克群岛拉罗汤加-拉罗汤加（机场代码） |
| RAR | Reasonably Assured Resources | 合理保证的资源 |
| RAR | Risk Assessment Report | 风险评估报告 |
| RAR | Road Accident Rescue | 道路事故救援 |
| RAR | Revenue Agent Report (US IRS) | 税务代理报告（美国国税局） |
| RAR | Run At Risk | 风险运行 |
| RAR | Reliability Assessment Report | 可靠性评估报告 |
| RAR | Rapidly Adapting Receptors | 快速适应受体 |
| RAR | Revise As Required | 根据需要进行修订 |
| RAR | Report of Actual Reimbursements | 实际报销报告 |
| RAR | Rear Axle Ratio (vehicle drivetrain) | 后轴传动比（车辆传动系） |
| RAR | Riparian Areas Regulation (Canada) | 河岸区法规（加拿大） |
| RAR | Rhodesian African Rifles | 罗德西亚非洲步枪 |
| RAR | Resource Adapter Archive (J2EE) | 资源适配器存档（J2EE） |
| RAR | Release After Reception (token ring, IEEE 802.5) | 接收后释放（令牌环，IEEE 802.5） |
| RAR | Royal Australian Regiment | 澳大利亚皇家军团 |
| RAR | Real Aperture Radar | 实孔径雷达 |
| RAR | Resource Allocation Request | 资源分配请求 |
| RAR | Raise A Rate | 提高A利率 |
| RAR | Rotate Accumulator Right | 向右旋转收集器 |
| RAR | Rarotonga ( South Pacific), Cook Islands | 库克群岛拉罗汤加岛（南太平洋） |
| RAR | Rapidly Adapting Receptor | 快速适应受体 |
| RAR | Russian ARchiver | 俄罗斯ARchiver |
| RAR | Refill Authorization Request | 重新加注授权请求 |
| RAR | Recorded Accomplishment Rate | 记录完成率 |
| RAR | Remote Access Router (DSL Modem/ router) | 远程接入路由器(DSL调制解调器或路由器) |
| RAR | Refund-Anticipated Return | 退款预期回报 |
| RAR | Registrul Auto Roman (Romanian Automobile Registry) | Registrul Auto Roman（罗马尼亚汽车注册处） |
| RAR | Runway Acceptance Rate | 跑道验收率 |
| RAR | right arm reclining | 右臂倾斜 |
| RAR | Remedial Action Report | 补救措施报告 |
| RAR | Rarotongan | 拉罗汤加语 |
| RAR | RAR Compressed file archive | RAR压缩文件存档 |
| RAR | Roshal Archive (WinRAR compressed file format; file extension) | Roshal Archive（WinRAR压缩文件格式；文件扩展名） |
| RAR | Rescue and Recovery | 救援和恢复 |
| RAR | Rapid Assessment And Response | 快速评估和响应 |
| RAR | Rebolar A Rir (Portuguese: lauging out loud) | 篮板球A Rir（葡萄牙语：大声喊叫） |
| RAR | Read-After-Read | 读取后读取 |
| RAR | Rock Am Ring | Rock Am戒指 |
| RAR | right arm resting | 右臂休息 |
| RAR | relative area response | 相对面积响应 |
| RAR | right arm recumbent | 右臂横卧 |