| Acronym | Definition |
|---|
| FRR | Free Registration Required |
| FRR | Furniture Row Racing (team; Colorado) |
| FRR | Flint River Ranch (Chapel Hill, North Carolina) |
| FRR | False Rejection Rate (biometrics) |
| FRR | Fast Re-Route |
| FRR | False Rejection Rate |
| FRR | Free Rasalhague Republic (gaming) |
| FRR | Fast Reroute (MPLS protection scheme) |
| FRR | Financial Risk Rating |
| FRR | Flight Readiness Review |
| FRR | Fonds de Réserve pour les Retraites (French: Pension Reserve Fund) |
| FRR | Floating Reference Rate (finance) |
| FRR | Frequency Restoration Reserve (power grids; various locations) |
| FRR | Financial Reporting Release |
| FRR | Fire Resistance Rating |
| FRR | Fusion Rock Radio (online radio) |
| FRR | Free Range Router (open-source software) |
| FRR | Front Royal, Virginia |
| FRR | Facility Repair and Renewal (US Army program) |
| FRR | Financial Reporting Requirements |
| FRR | First Right of Refusal |
| FRR | Functional Readiness Review |
| FRR | Functional Recovery Routine |
| FRR | Fiber Reinforced Rubber |
| FRR | Functional Requirements Review |
| FRR | Field Return Rate (quality control) |
| FRR | Financial Restructuring and Recovery (finance) |
| FRR | Facility Risk Rating |
| FRR | Fuel Return Rate |
| FRR | Forward Resource Reservation |
| FRR | Field Reduction Region |
| FRR | Full Reimbursement Rate |
| FRR | Fitted For Radio |
| FRR | Field Revision Request |