| RET | Retire/Retired | 退休/退休 |
| RET | Registered Environmental Technician (NEHA) | 注册环境技术员（NEHA） |
| RET | Release Engineering Team | 发布工程团队 |
| RET | Registered Engineering Technologist (Canada) | 注册工程技术专家（加拿大） |
| RET | retarded(delayed) | 延迟（延迟） |
| RET | Research Experiences for Teachers | 教师的研究经验 |
| RET | Rat Exposure Test | 大鼠暴露试验 |
| RET | Rational Emotive Therapy | 理性情绪治疗 |
| RET | Return (From Procedure Call; CPU instruction) | 返回（来自过程调用；CPU指令） |
| RET | Renewable Energy Technology | 可再生能源技术 |
| RET | Research Education for Teachers | 教师研究教育 |
| RET | Rearranged During Transfection Protooncogene | 原癌基因转染过程中的重排 |
| RET | retarded | 迟钝的 |
| RET | revolution | 革命 |
| RET | reticulocytes | 网织红细胞 |
| RET | Retract | 收回 |
| RET | Retail | 零售 |
| RET | Rotterdamsche Electrische Tram | Rotterdamsche电气有轨电车 |
| RET | Rost, Norway | 挪威罗斯特 |
| RET | Retardando (musical term, slow down) | 减速（音乐术语，减速） |
| RET | Regional Enforcement Team | 区域执法团队 |
| RET | Research Effort/Test | 研究/测试 |
| RET | Remote Electrical Downtilt | 远程电动向下倾斜 |
| RET | Reliability Evaluation Test | 可靠性评估试验 |
| RET | Reactor Effluent Temperature | 反应器出水温度 |
| RET | Resonant Energy Transfer | 共振能量传递 |
| RET | Resolution Enhancement Technology (Hewlett Packard) | 分辨率增强技术（Hewlett-Packard） |
| RET | Retention | 保持 |
| RET | Riedel Environmental Technologies, Inc | Riedel环境技术公司 |
| RET | Return from Procedure | 从程序返回 |
| RET | Resources For Educational Technology | 教育技术资源 |
| RET | Retalhuleu (Guatemala, territorial divison) | Retalhuleu（危地马拉，领土分割） |
| RET | Returned | 返回 |
| RET | Recordall Electronic Transmitter | Recordall电子变送器 |
| RET | right esotropia | 右内斜视 |
| RET | rational-emotive therapy | 理性情绪疗法 |
| RET | repetitive extrasystole threshold | 重复性早搏阈值 |
| RET | rad(radiation absorbed dose)equivalent therapeutic | rad（辐射吸收剂量）等效治疗 |
| RET | reticular(formation) | 网状（地层） |