| Abbreviation | Definition |
|---|---|
| CLASS | Committee for Law Abiding State Senators |
| CLC | Constituency Leaders Council |
| CLP | City Light Posters |
| CLRA | Civil Liberties Restoration Act of 2005 |
| CLS | Chicago Lifeguard Service |
| CLSP | Cleveland Lakefront State Park |
| CLV | Cleveland, Ohio |
| CMA | Census Metropolitan Area |
| CMA | Centers of Mutual Aid |
| CMAB | California Milk Advisory Board |
| CMAB | Central Minnesota Arts Board |
| CMAC | Case Management Administrator Certification |
| CMAD | Community Mine Awareness for Development |
| CMAP | Chicago Metropolitan Agency for Planning |
| CMARD | Coalition of Municipalities Against Racism and Discrimination |
| CMAS | California Multiple Award Schedule |
| CMC | Certified Municipal Clerk |
| CMDA | Chennai Metropolitan Development Authority |
| CME | continuing medical education |
| CMED | Certified Member of the Engine Department |