| Acronym | Definition |
|---|
| CESAR | Centro de Estudos e Sistemas Avançados do Recife (Portugese IT company) |
| CESAR | Cabauw Experimental Site for Atmospheric Research (Netherlands) |
| CESAR | Center for Substance Abuse Research |
| CESAR | Center for Engineering Science Advanced Research (Oak Ridge National Laboratory) |
| CESAR | Computing Environment STRATCOM Architecture |
| CESAR | Central European Symposium on Antimicrobial Resistance |
| CESAR | Centre for Environmental Studies and Research (Sultan Qaboos University) |
| CESAR | CERN Electron Storage and Accumulation Ring |
| CESAR | Calendrier Electronique des Spectacles sous l'Ancien Regime Etsous la Revolution (French) |
| CESAR | Cloud Electrification Studies Using Aircraft and Radar |