UDFA
| Acronym | Definition |
|---|---|
| UDFA | Undrafted Free Agent (National Football League) |
| UDFA | Upper Demerara Football Association (Guyana) |
| UDFA | Ultrasound Directed Follicle Aspiration |
| UDFA | UMIST (University of Manchester Institute of Science and Technology) Database for Astrochemistry (UK) |