| Acronym | Definition |
|---|
| DIRN➣Direction Interdépartementale des Routes Nord (French: Interdepartmental Directorate of Roads North) |
| DIRN➣Defined Interstate Rail Network (Australia) |
| DIRN➣Directory Number (VoIP network) |
| DIRN➣Digital Interaction Research Network (Umeå University; Sweden) |
| DIRN➣Dispensational International Research Network (theology) |