| 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) |