| Acronym | Definition |
|---|
| FBR | Fortnite Battle Royale (gaming) |
| FBR | Fueled by Ramen (record label) |
| FBR | Federal Board of Revenue (Pakistan) |
| FBR | Fast Breeder Reactor |
| FBR | Finkel-Biskis-Reilly (virus) |
| FBR | Federal Benefit Rate |
| FBR | Franchise Business Review (market research; Portsmouth, NH) |
| FBR | Frequency Based Replacement |
| FBR | Flashback Express Recorder |
| FBR | Friedman, Billings, Ramsey Group, Inc. (investment firm) |
| FBR | Follow Back Resistance |
| FBR | Foundation for Biomedical Research |
| FBR | Fluidized Bed Reactor |
| FBR | Foundation for Blood Research |
| FBR | Federal Bureau of Reclamation |
| FBR | Full Blown Rose (rock band) |
| FBR | Folkbildningsrådet (Sweden) |
| FBR | Feedback Report |
| FBR | Fixed Bed Reactor |
| FBR | Faster Block Rate (gaming, Diablo 2) |
| FBR | Fermeture Bâtiment du Roussillon (French building company) |
| FBR | Front to Back Ratio |
| FBR | Foreign Body Removal |
| FBR | Façonnage Brochage Rennais (French building firm) |
| FBR | Faites de Beaux Rêves (French: Sweet Dreams) |
| FBR | Frequency-Based Replacement |
| FBR | Finite Basis Representation |
| FBR | Franko Bullet Rotator (fishing lure) |
| FBR | Florida Boxer Rescue |
| FBR | Flowing Black Robe (Everquest game item) |
| FBR | Freeboard Ratio |
| FBR | Fireball Radius |
| FBR | Foundation for Biblical Research |
| FBR | Fire and Burglary-Resistant (safes) |
| FBR | Fachvereinigung Betriebsund Regenwassernutzung |
| FBR | Fabric-Based Replication (storage technique) |
| FBR | Financial Budget Review |
| FBR | Fouled Beyond Repair (polite form) |
| FBR | Formula Based Regulation |
| FBR | Forward-Backward Ratio (antenna directivity) |