TIAR
| Acronym | Definition |
|---|---|
| TIAR | Tratado Interamericano de Asistencia Recíproca (Spanish: Interamerican Treaty of Reciprocal Assistance) |
| TIAR | Tasmanian Institute of Agricultural Research |
| TIAR | Title Insurance Arbitration Rules (American Land Title Association) |
| TIAR | Transabdominal Internal Anterior Repair |