| Acronym | Definition |
|---|
| FDN➣Foundation |
| FDN➣Fredonia (Amtrak station code; Fredonia, NY) |
| FDN➣Functional Diagnostic Nutrition (certification course) |
| FDN➣Family Dinner Night (various organizations) |
| FDN➣Fault Discrimination Network |
| FDN➣Fixed Dialing Numbers |
| FDN➣Fully Distinguished Name |
| FDN➣French Data Network (France; est. 1992) |
| FDN➣Fixed Dialing Number (telecommunications) |
| FDN➣Fuerza Democratica Nicaraguense (Nicaraguan Democratic Force) |
| FDN➣Florida Digital Network |
| FDN➣Freedom Data Networks (Hitachi) |
| FDN➣Fichier Dosimétrique National (French: National Dose Registry; Canada) |
| FDN➣Final Demand Notice (debt collection) |
| FDN➣Fluor Daniel Northwest Inc. |
| FDN➣Free Dialed Number |
| FDN➣Future Digital Network |
| FDN➣Fonds de Développement National (French: National Development Fund) |