| Acronym | Definition |
|---|
| UK | United Kingdom |
| UK | Unknown |
| UK | University of Kansas |
| UK | Uttarakhand (Indian state) |
| UK | Ukrainian (language) |
| UK | University of Kentucky (also seen as UKY) |
| UK | Univerzita Karlova |
| UK | Univerzita Komenskeho (Comenius University Bratislava) |
| UK | Urokinase |
| UK | Universitätsklinik (German: university hospital) |
| UK | University of Kerala (Kerala, India) |
| UK | University of Khartoum (Sudan) |
| UK | Universala Kongreso (Esperanto: World Congress) |
| UK | Utgarde Keep (gaming; World of Warcraft dungeon) |
| UK | Uttara Kannada (district of Karnataka, India) |
| UK | Utilities Kingston |
| UK | Unabkömmlich (German: Exempt from Military Service) |
| UK | Universiteit de Kaapstad (University of Cape Town) |