| Acronym | Definition |
|---|
| ECOSA➣European Consumer Safety Association |
| ECOSA➣European Calcium Organic Stabilisers Association (industrial chemistry) |
| ECOSA➣East Central Ontario Soccer Association (Ontario, Canada) |
| ECOSA➣Education and Communication for Sustainability in Africa (environmental education survey) |
| ECOSA➣European Conference on Optical Systems and Applications (physics) |
| ECOSA➣Erindale Coptic Orthodox Students Association (University of Canada) |