| Acronym | Definition |
|---|
| ESAR | Eastern and Southern African Region |
| ESAR | Explorer Search and Rescue |
| ESAR | Emergency Services Adventure Race |
| ESAR | École Spéciale d'Architecture de Lausanne (French: Special School of Architecture in Lausanne; Switzelrand) |
| ESAR | Electronic Student Aid Report |
| ESAR | Environmental Situation Assessment Radar (x-band radar for detecting birds at airfields) |
| ESAR | Electronically Steerable Array Radar |
| ESAR | Enhanced Synthetic Aperture Radar |
| ESAR | Electromagnetic Spectrum Allocation Request |
| ESAR | Engineers and Scientists for Animal Rights |
| ESAR | Extended Subsequent Application Review |
| ESAR | Empirically Successful Automated Reasoning |
| ESAR | Emissions Security Assessment Request |
| ESAR | Equivalent Still-Air Range |
| ESAR | Electronic Satellite Access Request |