JEFF
| Acronym | Definition |
|---|---|
| JEFF | Jeffrey |
| JEFF | Jefferson National Expansion Memorial (US National Park Service) |
| JEFF | Journal of Engineered Fibers and Fabrics (School of Materials Science and Engineering; Clemson University; Clemson, SC) |
| JEFF | Jonio Educational Film Festival (Italy) |
| JEFF | Joint Evaluated Fission and Fusion File (data library) |
| JEFF | J Executable File Format (J Consortium) |