| Acronym | Definition |
|---|
| TIARA | Tactical Intelligence And Related Activities |
| TIARA | Test Infrastructure and Accelerator Research Area |
| TIARA | The Irish Ancestral Research Association |
| TIARA | Tamworth Independent Artist Recognition Awards (Australia) |
| TIARA | Tokyo International Amateur Radio Association |
| TIARA | Tornado Integrated Avionics Research Aircraft |
| TIARA | TIARA Is A Recursive Acronym |
| TIARA | Treatment Initiatives After Radiological Accidents (European Commission) |
| TIARA | Thousand Islands Area Residents Association (Ontario, Canada) |
| TIARA | Timely Information for All Relevant and Affordable (Singapore) |
| TIARA | Townsend Independent Actuarial Research Alliance (Wolcott, CT) |
| TIARA | Texas Independent Auto Resellers Association (Austin, TX) |
| TIARA | Tactical Intelligence Analysis and Reporting Application |
| TIARA | Task Inventory Analysis and Requirements Application |
| TIARA | Target Illumination and Recovery Aids |
| TIARA | Tritium Inventory And Release Analysis |
| TIARA | Task Inventory Analysis Review Application |