aFRR
| Acronym | Definition |
|---|---|
| aFRR | Automatic Frequency Restoration Reserve (energy) |
| aFRR | Ascorbate Free Radical Reductase (plant physiology) |
| aFRR | Annual Fixed Revenue Requirement (energy regulation) |
| aFRR | Alpha Frame Rate Reduction |
| aFRR | Alabamians for Real Reform (political group) |
| aFRR | Air Force Recognition Ribbon |
| aFRR | Associação Fluminense de Radioamadorismo e Rádio do Cidadão (Portugese) |