PSIR
| Acronym | Definition |
|---|---|
| PSIR | Political Science and International Relations (university department) |
| PSIR | Phase Sensitive Inversion Recovery |
| PSIR | Passenger Side Inflatable Restraint |
| PSIR | Program on Studies in Religion (University of Michigan) |
| PSIR | Pre-Sentence Investigative Report |
| PSIR | Prix Supérieur Interrégional (French: Inter-Regional Prize) |