| Acronym | Definition |
|---|
| BNF | Bind-N-Fly (radio-controlled aircraft) |
| BNF | Bibliothèque Nationale de France |
| BNF | Bibliographie Nationale Française (French: French National Bibliography; National Library of France) |
| BNF | Backus-Naur Form |
| BNF | British National Formulary |
| BNF | British Nutriiton Foundation (est. 1967; UK) |
| BNF | Botswana National Front |
| BNF | Banco Nacional de Fomento (Spanish) |
| BNF | Backus Naur Form |
| BNF | Backus Normal Form |
| BNF | Beneficiary |
| BNF | Biological Nitrogen Fixation |
| BNF | Brave New Films |
| BNF | Big Name Fan |
| BNF | Breathable Nitrile Foam (wearable fabric) |
| BNF | British Nuclear Fuels |
| BNF | Barcelona Negocios y Franquicias (Spanish: Barcelona Businesses and Franchises; Barcelona, Spain; trade show) |
| BNF | Best Neighbor Forever |
| BNF | Brain Not Found |
| BNF | Brand Names Foundation |
| BNF | Broadband Nebular Filter |
| BNF | Best New Friend |