| Acronym | Definition |
|---|
| NDFA➣National Development Finance Agency (est. 2003; Ireland) |
| NDFA➣Non-Deterministic Finite Automaton |
| NDFA➣Non-Drafted Free Agent (various sports) |
| NDFA➣North Dakota Firefighters Association |
| NDFA➣Nitrogen Derived from Atmosphere |
| NDFA➣Nanoscale Devices Fundamentals and Applications (NATO Advanced Research Workshop; publication) |
| NDFA➣Nathalia and District Football Association |