| 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 |