| Abbreviation | Definition |
|---|---|
| RECS | Race Environment Construction System |
| REDM | Relax Extremely Daring Mountaineers |
| REGC | Royal Eastbourne Golf Club |
| REL | Rapid Engine League |
| REP | Repetition Each Press |
| REP | Repetitions |
| REP | Rubbing Eases Pain |
| RET | Resistance, Endurance, and Toning |
| REV | Race Evolution Vehicle |
| REV | Race Exertion Vehicle |
| REVS | Revolutions |
| REW | Rewound |
| REX | Rear Entertainment Xtreme |
| RF | Right Fielder |
| RF | Runs For |
| RFA | Restricted Free Agent |
| RFC | Rangers Football Club |
| RFC | Rugby Football Club |
| RFE | Regulatory Fish Encyclopedia |
| RFI | Roling For Ice |