| Acronym | Definition |
|---|
| TNFF➣The National Fantasy Fan Federation (website) |
| TNFF➣Texas Neurofibromatosis Foundation |
| TNFF➣Transparent Network Failover Failback |
| TNFF➣Thai Nippon Fish Farm (Thailand) |
| TNFF➣The New Final Fantasy (gaming) |
| TNFF➣Travelling Northern Film Festival |
| TNFF➣Thursday Night Fly Fishing Club |