ECJ
| Acronym | Definition |
|---|---|
| ECJ | European Court of Justice |
| ECJ | European Coatings Journal (European publication) |
| ECJ | Ensemble de Cuivres Jurassien (French: Jura Brass Ensemble; Jura, Switzerland) |
| ECJ | Eclipse Concept Jet (Eclipse Aviation) |
| ECJ | European Competition Journal |
| ECJ | École de Conduite Jeumontoise (French driving school) |
| ECJ | Ernest Cockrell Jr. Hall (University of Texas at Austin) |
| ECJ | Evolutionary Computation Journal (artificial intelligence) |