| Abbreviation | Definition |
|---|---|
| RJ | Road Junction |
| RJC | Regional Jet Center of Harrrison |
| RKS | Rear Kitchen with Slide (RV model) |
| RKV | Redesigned Kill Vehicle |
| RKV | Relativistic Kill Vehicle |
| RL | Red Line |
| RL | Road Luxury |
| RLIS | Regional Land Information System |
| RLJ | Range Lights on the Kennebec River |
| RLP | Rotary License Plate |
| RLR | Red Light Running |
| RLR | Regular Luggage Rack |
| RLS | Real Living with Slide (RV model) |
| RLT | Road Load Testing |
| RLV | Really Large Vehicle |
| RM | Retained Mode |
| RM | River Mile |
| RMI | Radio Magnet Indicator |
| RMI | Reaction Motors, Inc. |
| RML | Radar Microwave Link |