| Abbreviation | Definition |
|---|---|
| TMZ | Testosterone Management Zone |
| TN | Training And Nutrition |
| TNA | Talula Nation Athletics |
| TNA | Talula National Athletics |
| TNA | Team Nemesis Accessories |
| TNA | Total Nonstop Action |
| TNA | Totally New Action |
| TNBA | The National Bowling Association |
| TNBR | Tuesday Night Bike Ride |
| TNCA | Tamil Nadu Cricket Association |
| TNG | Tuesday Night Gamers |
| TNH | Team Norrköping Handboll |
| TNI | Team Natty Ice |
| TNL | The New Legend |
| TNL | To Next Level |
| TNLN | Took Nothing, Left Nothing (Geocaching) |
| TNLNSL | Took Nothing, Left Nothing, Signed Log |
| TNNS | Tennis |
| TNT | Traveling N Tumbling |
| TNZ | Touch Rugby New Zealand |