| Acronym | Definition |
|---|
| HDJ➣Heimattreue Deutsche Jugend (German: Home Faithful German Youth; youth political party) |
| HDJ➣Hospitalisation de Jour (French: Day Hospital; outpatient hospital facilities) |
| HDJ➣Homeland Defense Journal |
| HDJ➣Haus des Jugendrotkreuzes (German: House of Red Cross Youth; Germany) |
| HDJ➣Hydrographic Department of Japan |