IRIR
| Acronym | Definition |
|---|---|
| IRIR | I Ride I Recycle (skateboards) |
| IRIR | Institutul Roman de Istorie Recenta (Romanian Institute for Recent History) |
| IRIR | Islamic Republic of Iran Railways (state-owned railway system) |
| IRIR | Internet Resources for Institutional Research (Association for Institutional Research) |
| IRIR | Inter-Racial Inter-Religious Harmony Nite (Singapore) |