| Acronym | Definition |
|---|
| RFL | Relay For Life (American Cancer Society fundraiser) |
| RFL | Rugby Football League (UK) |
| RFL | Reason For Living |
| RFL | Restoring Family Links |
| RFL | Recent File List |
| RFL | Royalty Free License |
| RFL | Road Fund Licence (UK tax) |
| RFL | Refuel |
| RFL | Request for Leave |
| RFL | Restrictive Fire Line |
| RFL | Robot Fighting League |
| RFL | Resistance Fault Locator |
| RFL | radiofrequency lesioning (pain management) |
| RFL | Revue Francophone des Laboratoires (French medical magazines) |
| RFL | Required Fitness Level |
| RFL | Resorcinol-Formaldehyde-Latex (chemical system used to bond polyester or nylon to rubber) |
| RFL | Roommate for Life |
| RFL | Resident Faculty Leader (West Virginia University) |
| RFL | Revolution Fight League (martial arts) |
| RFL | Registered Foreign Lawyer (UK) |
| RFL | Rosario Football League (Argentina) |
| RFL | Reflections Records |
| RFL | Restricted Frequency List (US DoD) |
| RFL | Radio Fréquence Luynes (French radio station) |
| RFL | Random Fatigue Limit |
| RFL | Ready For Lunch? |
| RFL | Research for Life |
| RFL | Really Freaking Loud (Polite Form) |
| RFL | Restricted Flammable Liquid |
| RFL | Regulatory Functions Levy (Australia) |
| RFL | Response Force Leader (US DoD) |
| RFL | Really Freaking Lame (polite form) |
| RFL | Radio Fréquence Laon (French radio station) |
| RFL | Right Fuel Level |
| RFL | Rebel Football League (fantasy football) |
| RFL | Réunion Fruits et Légumes (French produce company) |
| RFL | Ravalement de Façades Lyonnaises (French home renovation company) |
| RFL | Rossbrook Football League (Winnipeg, Manitoba, Canada) |