| RFL | Relay For Life (American Cancer Society fundraiser) | 生命接力（美国癌症协会筹款活动） |
| RFL | Reading in a Foreign Language | 外语阅读 |
| RFL | Resources For Living | 生活资源 |
| RFL | Really Friggin Loud | 真的很吓人 |
| RFL | Rebel Football League | 叛军足球联赛 |
| RFL | Robot Football League | 机器人足球联赛 |
| RFL | Reaching For Life Ministries | 接触生命部门 |
| RFL | Resident Faculty Leader (West Virginia University) | 常驻教长（西弗吉尼亚大学） |
| RFL | Rossbrook Football League | 罗斯布鲁克足球联赛 |
| RFL | Road Fund Licence | 道路基金牌照 |
| RFL | Reiter-Feissinger relapse-free survival | Reiter Feissinger无复发生存率 |
| RFL | Recency, Frequency, And Lifetime | 近期、频率和寿命 |
| RFL | Real Freakin Loud | 真正的弗雷金大声 |
| RFL | Request for Leave | 请假申请 |
| RFL | Robot Fighting League | 机器人格斗联盟 |
| RFL | Refuel | 加油 |
| RFL | Rugby Football League (UK) | 橄榄球足球联赛（英国） |
| RFL | Resorcinol-Formaldehyde-Latex (chemical system used to bond polyester or nylon to rubber) | 间苯二酚甲醛乳胶（用于将聚酯或尼龙粘合到橡胶上的化学系统） |
| RFL | Right Fuel Level | 右侧燃油油位 |
| RFL | Reason For Living | 生活的理由 |
| RFL | radiofrequency lesioning (pain management) | 射频损伤（疼痛管理） |
| RFL | Reflections Records | 反射记录 |
| RFL | Restricted Frequency List (US DoD) | 受限频率列表（美国国防部） |
| RFL | Really Freaking Loud (Polite Form) | 真的很吓人（礼貌的形式） |
| RFL | Random Fatigue Limit | 随机疲劳极限 |
| RFL | Regulatory Functions Levy (Australia) | 监管职能征税（澳大利亚） |
| RFL | Really Freaking Lame (polite form) | 真的很吓人Lame（礼貌用语） |
| RFL | Ready For Lunch? | 准备好吃午饭了吗？ |
| RFL | Restrictive Fire Line | 限制性火线 |
| RFL | Rosario Football League (Argentina) | 罗萨里奥足球联赛（阿根廷） |
| RFL | Response Force Leader (US DoD) | 反应部队领导（美国国防部） |
| RFL | Required Fitness Level | 要求的健身水平 |