| Acronym | Definition |
|---|
| OTOA➣Otoancorin |
| OTOA➣Overseas Tour Operators Association (Japan) |
| OTOA➣Ordo Templi Orientis Antiqua |
| OTOA➣Ohio Tactical Officers Association (Kent, OH) |
| OTOA➣Outdoor Tour Operators Association (Australia) |
| OTOA➣One Thing or Another (commonly used phrase) |