| Abbreviation | Definition |
|---|---|
| RIR | Reference Intensity Ratio |
| RIR | Regional Internet Registries |
| RIR | Regionally Important Resource |
| RIR | Repetitions In |
| RIR | Repetitions In Reserve |
| RIR | Reps in Reserve |
| RIR | Reserve Infantry Regiment |
| RIR | Resolution Independent Raster |
| RIR | Resource Inventory Report |
| RIR | Response Interruption and Redirection |
| RIR | Response Interruption Redirection |
| RIR | Response Interruption/Redirection |
| RIR | Responsibility Integrity Respect |
| RIR | Rhode Island Re |
| RIR | Rhode Island Red |
| RIR | Rhode Island Road |
| RIR | Rock in Rio |
| RIR | Rockers In Recovery |
| RIR | Room In Roof |
| RIR | rylan is rubbish |