| Acronym | Definition |
|---|
| UNF | University of North Florida |
| UNF | Unfinished |
| UNF | Unified National Fine Thread (tools) |
| UNF | United Nations Foundation |
| UNF | UniFirst Corporation (stock symbol; Wilmington, MA) |
| UNF | Unified |
| UNF | Underflow |
| UNF | Ungdomens Nykterhetsförbund |
| UNF | Ungdommens Naturvidenskabelige Forening (Denmark) |
| UNF | United Nations Fund |
| UNF | Unified National Fine |
| UNF | Uwharrie National Forest (North Carolina) |
| UNF | Unified Fine Thread |
| UNF | Umpqua National Forest (Oregon) |
| UNF | Unité de Neuroimagerie Fonctionnelle (French: Functional Neuroimaging Unit; Canada) |
| UNF | Uniform National Fine (screw thread) |
| UNF | Unreasonable Forward Sequence Counter Indicator Bit |