| Acronym | Definition |
|---|
| CRRR➣Certified Return Receipt Requested (USPS) |
| CRRR➣Connecticut River Raft Race (Portland, CT) |
| CRRR➣Copyright and Related Rights Regulations (intellectual property law; UK) |
| CRRR➣Community Recycling and Resource Recovery |
| CRRR➣Chemical Risk Review and Reduction (US EPA) |
| CRRR➣Colorado Rhodesian Ridgeback Rescue (Littleton, CO) |
| CRRR➣Continuous Release Reporting Regulation (US EPA) |