| Acronym | Definition |
|---|
| OSEA➣Oregon School Employees Association |
| OSEA➣Ontario Sustainable Energy Association (Canada) |
| OSEA➣Offshore South East Asia (oil and gas industry) |
| OSEA➣Oklahoma Society of Enrolled Agents (Oklahoma City, OK) |
| OSEA➣Ohio Student Education Association (Lexington, OH) |
| OSEA➣Organization for Synthetic Environment Architecture |
| OSEA➣Office of Strategic Environmental Analysis (US EPA) |