| Acronym | Definition |
|---|
| OTRA➣On the Road Again |
| OTRA➣Other Than Regular Army |
| OTRA➣Vilnius Old Town Renewal Agency (Lithuania) |
| OTRA➣Ontario Trail Riders Association (Canada) |
| OTRA➣Old Town Residents Association (Takoma Park, MD) |
| OTRA➣Office of Trust Review and Audit (US DOI) |
| OTRA➣Overseas Theater Requisitioning Authority |