SEFF
| Acronym | Definition |
|---|---|
| SEFF | Sonoma Environmental Film Festival (Sonoma, CA) |
| SEFF | Southeast Electric Flight Festival (Americus, GA) |
| SEFF | Seattle Environmental Film Festival (Seattle, WA) |
| SEFF | Safe Events for Families (Shawnee, OK) |
| SEFF | Southeast Electric Fun Fly (model airplanes) |