| Acronym | Definition |
|---|
| RBL | Royal British Legion (UK charity) |
| RBL | Royal Bavarian Liga (German: Royal Bavarian League) |
| RBL | Realtime Blackhole List |
| RBL | Replace Block |
| RBL | Realtime Block List |
| RBL | Rat Basophilic Leukemia |
| RBL | Reserve-Based Lending |
| RBL | Rasen Ballsport Leipzig (German football team) |
| RBL | Real-Time Blackhole List (for UCE) |
| RBL | Resource-Based Learning |
| RBL | Russian Ruble (national currency) |
| RBL | Recess before Lunch (various schools) |
| RBL | Ruthless by Law (hip hop) |
| RBL | Results Based Leadership |
| RBL | Reasonable Benefits Limit |
| RBL | Rule Based Language (computing) |
| RBL | Relay Block List |
| RBL | Rifled Breech-Loader |
| RBL | Rating Background Level (Australia, ambient noise) |
| RBL | Remote Boot in Linux (computing) |
| RBL | Raised Black Letters (tires) |
| RBL | Reclams Bibliothek Leipzig (German library) |
| RBL | Right Buttock Line (location in aircraft) |
| RBL | Reliability Based Logistics |
| RBL | Registered Black List |
| RBL | Readiness Based Leveling |
| RBL | Risk Based Levy |
| RBL | Rebroadcast Link (communications) |
| RBL | Reverse Black Lists (information security) |
| RBL | Rock Band Lounge (magazine) |
| RBL | Range Bearing Launch |
| RBL | Reviewed by Liz (blog) |
| RBL | Read Block Latches |
| RBL | Retarder Brake Light |
| RBL | Radiographic Bone Level |
| RBL | Right Buttline (engineering drawings) |