| Acronym | Definition |
|---|
| EFN | École Française de Naples (French: French School of Naples) |
| EFN | Escuela Francesa de Negocios (Spanish: French School of Business; Uruguay) |
| EFN | Exchange Fund Notes |
| EFN | Extra Floral Nectar (plants) |
| EFN | Environmental Funders Network |
| EFN | Einheitliche Fortbildungsnummer |
| EFN | Ephrin |
| EFN | Electronic Frontier Norway |
| EFN | Eugene Free Community Network |
| EFN | European Fellowship in Neuropathology (professional standing) |
| EFN | External Financing Needed |
| EFN | Exceptional Financial Need scholarship |
| EFN | Endettement Financier Net (Finance) |
| EFN | Engine Family Number (automobiles) |
| EFN | Emerging Futures Network |