| Acronym | Definition |
|---|
| EFAS | École de Formation d'Animation Sociale (French animation training school) |
| EFAS | English for Academic Success (Canada) |
| EFAS | European Federation of Autonomic Societies (UK) |
| EFAS | En Route Flight Advisory Service |
| EFAS | European Federation of Audiology Societies |
| EFAS | Entreprise Féminine Rurale d'Economie Sociale (French: Corporate Women Rural Social Economy; Morocco) |
| EFAS | Engine Failure Assist System |
| EFAS | European Foot & Ankle Societies |
| EFAS | Eastern Food Appreciation Society (UK) |
| EFAS | Enhanced Fault Alarm System |