SEFD
| Acronym | Definition |
|---|---|
| SEFD | Stichting Examens Financiele Dienstverlening (Dutch: Financial Services Exams Foundation) |
| SEFD | System Equivalent Flux Density (space research) |
| SEFD | Steger Estates Fire Department (Chicago Heights, IL) |
| SEFD | Sonoita-Elgin Fire Department (Arizona) |
| SEFD | Shape Error Forecasting Decoding |
| SEFD | Science and Engineering Fun Days (Hong Kong) |