| Abbreviation | Definition |
|---|---|
| DDRA | Dirt Drag Racing Association |
| DDRA | Dominion Day Regatta Association |
| DDT | Dead Drop Time |
| DDV | Deutscher Drachenboot-Verband |
| DE | Direct Elimination |
| DE | Doubles Event |
| DEF | Defeated |
| DEF | Defender |
| DEG | Düsseldorfer Eislauf Gemeinschaft |
| DEI | Dale Earnhardt Inc |
| DEK | Dance Eat Kick |
| DEN | Denver Nuggets |
| DEPN | Dutch E-sport Players Network |
| DER | Defense Efficiency Ratio |
| DER | Defensive Efficiency Rating |
| DER | DERailleur gears |
| DET | Detroit Tigers |
| DF | Day Fisher |
| DFA | Designated For Assignment |
| DFGA | Du Pont Fish and Game Association |