| Acronym | Definition |
|---|
| UDW➣User Data Words |
| UDW➣User Defined Word |
| UDW➣University of Durban-Westville (South Africa) |
| UDW➣United Domestic Workers (est. 1979; San Diego, CA) |
| UDW➣Ultra Deep Water (drilling) |
| UDW➣Upside Down World (online political magazine; Latin America; est. 2003) |
| UDW➣User Data Word |
| UDW➣United Death Warriors (gaming clan) |
| UDW➣United Destroyers of War (gaming clan) |