| Abbreviation | Definition |
|---|---|
| SKV | Schweizerischer Kanu-Verband |
| SKW | Sport Klub Windhoek |
| SL | Sport Light |
| SL | Sporting Lisbon |
| SL | Sports And Light |
| SL | Sports Leicht |
| SL | Sports Luxury |
| SL | Starting Line |
| SLA | Sports Lawyers Association |
| SLAG | Scholars Leaders Athletes And Gentlemen |
| SLAG | Scholarship, Leadership, Athletics, and Gentlemen |
| SLAM | Science Lab Assistant Mile |
| SLAM | South Lancashire Advanced Motorcyclists |
| SLAM | Super Large Action Madness |
| SLAMDUNK | Sweet Layups, Aerial Maneuver, Defence Usually Not Keen |
| SLB | Sport Lisboa e Benfica |
| SLBA | Sierra Leone Boxing Association |
| SLG | Scout List Generator |
| SLG | Slugging Percentage |
| SLI | Sports Legacy Institute |