| 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) |