| Acronym | Definition |
|---|
| CUN | Cancun, Mexico (Airport Code) |
| CUN | Corporación Unificada Nacional de Educación (Spanish: National Unified Education Corporation) |
| CUN | Cunner |
| CUN | Communauté Urbaine de Nouakchott (French: Urban Community of Nouakchott; Nouakchott, Mauritania) |
| CUN | Consiglio Universitario Nazionale (Italian: National University Council) |
| CUN | Clínica Universitaria de Navarra |
| CUN | Centro Ufologico Nazionale |
| CUN | Communaute Urbaine de Niamey (French: Niamey Urban Community; Niger) |
| CUN | Clean-Up Nigeria |
| CUN | Cuneo Press, Inc. |