| Acronym | Definition |
|---|
| CSTAR | Collaborative Science, Technology and Applied Research |
| CSTAR | Chinese Small Telescope Array (astronomy) |
| CSTAR | Center for Space Transportation and Applied Research (UT/Tullahoma) |
| CSTAR | Comprehensive Substance Abuse Treatment and Rehabilitation Program (Missouri) |
| CSTAR | Combat Synthetic Training Assessment Range |
| CSTAR | Center for Strategic Technology and Research |
| CSTAR | Complex Scaled Tangent Rotation |
| CSTAR | Confidential Star Supplement |
| CSTAR | Combat Systems Training & Readiness |
| CSTAR | Combat Surveillance Target Acquisition Radar |
| CSTAR | Centre for Support and Training in Analysis and Research (Ireland) |