| Acronym | Definition |
|---|
| DEFS➣Département d'Education et Formation Spécialisées (French: Department of Education and Specialized Training; Canada) |
| DEFS➣Duke Energy Field Services |
| DEFS➣Direct-Applied Exterior Finish Systems (building construction) |
| DEFS➣Den Europeiske Faglige Samorganisasjon (Norwegian: The European Trade Union Confederation; EU) |
| DEFS➣Deschutes Estuary Feasibility Study (Washington) |
| DEFS➣Detailed Evaluation of Facial Symmetry (medical engineering) |
| DEFS➣Decreasing Electric Field Stimulation |