| Acronym | Definition |
|---|
| UCL | University College London |
| UCL | Université Catholique de Louvain |
| UCL | UEFA Champions League |
| UCL | University of Central Lancashire |
| UCL | Unfair Competition Law |
| UCL | Ulnar Collateral Ligament |
| UCL | Upper Control Limit |
| UCL | Understeer Control Logic |
| UCL | Ucl Compression Library |
| UCL | United Counties League (soccer) |
| UCL | Upper Confidence Limit |
| UCL | Union Communiste Libertaire (French: Libertarian Communist Union) |
| UCL | Union Centrista Liberal (Italian: Centrist Liberal Union) |
| UCL | United Clinical Laboratories (medical laboratory; Dubuque, IA) |
| UCL | University Computer Lab (various locations) |
| UCL | Upper Confidence Level |
| UCL | Uncomfortable Loudness Level |
| UCL | Universal Cyber League (online gaming group) |
| UCL | Unoccupied Crown Land (various locations) |
| UCL | Universal Communications Language |
| UCL | Unit Configured Load |
| UCL | User Control List |
| UCL | Unit Candidate List |
| UCL | Univac Canada, Ltd. |
| UCL | Urbancanopy Layer (meteorology) |
| UCL | Umal Consolidated Limited |
| UCL | Unión de Corresponsalía Local (Galician: Local Union Correspondent) |