| Acronym | Definition |
|---|
| EfW➣Energy From Waste |
| EfW➣Electric Front Windows |
| EfW➣Embedded Firewall |
| EfW➣Economic Freedom of the World |
| EfW➣Estimated Fetal Weight |
| EfW➣Electric Fusion Welded (pipe) |
| EfW➣Electric Field and Wave Experiment (Cluster spacecraft) |
| EfW➣Emergency Feedwater |
| EfW➣Entomology, Fisheries and Wildlife (Minnesota) |
| EfW➣Elbit-Fort Worth (Elbit Systems Ltd) |
| EfW➣Evanescent Floquet Wave |
| EfW➣Exercise First Wave (NATO simulation exercise) |
| EfW➣Exponential Forgetting Window (signal processing) |