| Acronym | Definition |
|---|
| DIRF | Declaração do Imposto de Renda Retido na Fonte (Portuguese: Statement of Income Tax Withheld at Source) |
| DIRF | Digital Information Research Foundation (India) |
| DIRF | Dansk Investor Relations Forening (Danish organization) |
| DIRF | Differential Interest Rate Fix (contracts) |
| DIRF | Délégation Interrégionale au Recrutement et a la Formation (French: Delegation to Inter Recruitment and Training) |
| DIRF | Declaracao de Imposto Retido na Fonte (Brazil) |
| DIRF | Double-Coating Indirect Rosette Formation (immunology) |
| DIRF | Dynamic Incorrect Read Fault |