| Abbreviation | Definition |
|---|---|
| RMZ | Radio Mandatory Zone |
| RMZ | Radio Mandatory Zones |
| RMZ | Rescue Mission Zambia |
| RMZ | Right Middle Zone |
| RN | Rally Novice |
| RN | Raving Num |
| RN | Raw Number |
| RN | Ray's Note |
| RN | Real Nigga |
| RN | Really Naughty |
| RN | Reference Noise |
| RN | refreshments and narcotics |
| RN | Registered Number |
| RN | Registration Number |
| RN | release notes |
| RN | Renumbering N |
| RN | Repaired Northridge |
| RN | Rescue Ninja |
| RN | Rio Negro |
| RN | Round To Nearest |