EFNI
| Acronym | Definition |
|---|---|
| EFNI | Europejskie Forum Nowych Idei (Polish: European Forum for New Ideas) |
| EFNI | Engin Flottant Non Identifié (French: Unidentified Floating Craft) |
| EFNI | Earth Force Naval Intelligence (Babylon 5 role-playing) |
| EFNI | Eosinophilic Fibrillary Neuronal Inclusions |