| Acronym | Definition |
|---|
| Circ | Circulation |
| CIRC | Circle |
| Circ | Circumference |
| Circ | Circuit |
| CIRC | Circular |
| CIRC | Circumcision |
| CIRC | Circumstance |
| CIRC | China Insurance Regulatory Commission |
| CIRC | Centre International de Recherche sur le Cancer (French: International Agency for Cancer Research) |
| CIRC | Civitan International Research Center (University of Alabama at Birmingham) |
| CIRC | Circular Reference |
| CIRC | Community Information Resource Center |
| CIRC | Cooperative Integrated Reading and Composition |
| CIRC | Climate Impacts Research Centre |
| CIRC | Cross Interleave Reed-Solomon Code (used on CDs) |
| CIRC | Collectif d'Information et de Recherche Cannabique |
| CIRC | Computer Incident Response Center |
| CIRC | Computer Incident Response Capability |
| CIRC | Central Illinois Robotics Club |
| CIRC | Community Informatics Resource Center |
| CIRC | Chemical Incident Reports Center |
| CIRC | Curtin Indigenous Research Centre |
| CIRC | Circumcision Information Resource Centre (Montreal, Canada) |
| CIRC | Corporate & Industrial Restructuring Corporation (Pakistan) |
| CIRC | Community Information and Referral Centre |
| CIRC | Computer Integrated Road Construction |
| CIRC | Canada's Information Resource Centre |
| CIRC | Central India Regional Council |
| CIRC | Central Information Reference and Control |
| CIRC | Commercial-Industrial Realty Council |
| CIRC | Cornell Institute for Research on Children |
| CIRC | Central Incident Response Center |
| CIRC | Career Information Resource Centre |
| CIRC | Childcare Information Reference Collection |
| CIRC | Cultural Industries Research Centre |
| CIRC | Circularization Burn (NASA) |
| CIRC | Computer Information and Resource Center (now defunct GWU division) |
| CIRC | Conflict of Interest in Research Committee |
| CIRC | Centralized Information Reference and Control |
| CIRC | Colorado Immigration Rights Coalition |