| Acronym | Definition |
|---|
| FAB | Fabrication |
| FAB | Fabulous |
| FAB | FURY (Fellowship of United Reformed Youth) Advisory Board |
| FAB | Fabrication Plant (semiconductors) |
| FAB | For A Bit |
| FAB | French-American-British (classification of leukemia) |
| FAB | Fast Atom Bombardment |
| FAB | Força Aérea Brasileira |
| FAB | Fine Arts Building |
| FAB | Functional Airspace Block (Single European Sky) |
| FAB | Antigen Binding Fragment (immunology) |
| FAB | Familial Adenomatous Polyposis |
| FAB | Florida Association of Broadcasters |
| FAB | Features Advantages and Benefits |
| FAB | First Aid Box |
| FAB | Field Artillery Brigade |
| FAB | Frequency Allocation Board (Pakistan) |
| FAB | Fulfillment, Assurance, and Billing (operational process areas for Telecommunication Service Providers) |
| FAB | Fire Alarm Box |
| FAB | Features-Attributes-Benefits |
| FAB | Fire Advisory Board |
| FAB | Flavoured Alcoholic Beverage |
| FAB | Fuel Air Bomb |
| FAB | Feline Advisory Board |
| FAB | Familie Als Berufung (German) |
| FAB | Fast And Bulbous |
| FAB | Final Atomic Buster (gaming) |
| FAB | Fitchburg Activities Board (Fitchburg State College, Fitchburg, MA) |
| FAB | Fernando Air Base (Lipa City, Batangas, Philippines) |
| FAB | Fresh Air Base (deep mine rescue) |
| FAB | Fairness and Accountability in Broadcasting Act |
| FAB | Forward Avionics Bay |
| FAB | Forward and Beyond (Vitalij Kuprij instrumental music album) |
| FAB | Field Assistance Branch |
| FAB | Fully Advised and Briefed (Thunderbirds TV show) |
| FAB | Financial Assurance Board |
| FAB | Fully Acknowledged Broadcast (Thunderbirds TV series) |
| FAB | Fragment of Immunoglobulin prepared by Papain Treatment |
| FAB | Freshman Advisory Board (student organization) |
| FAB | Flight Assignment Baseline |
| FAB | Filter, Air, Bag |
| FAB | Faugh-An-Ballagh (Gaelic: Clear the Way) |
| FAB | Fine Art on Broadway |
| FAB | Frequency Availability Broadcast |
| FAB | Forward Air Base |
| FAB | Field Artillery Board |
| FAB | Futures After Birth (UK program for teen parents) |
| FAB | Facility Authorization Basis |
| FAB | Fugasnaya Awiatsyonna Bomba (Russian Federation Air Force series of general purpose freefall iron bmbs) |
| FAB | Family Allowance, Class B |
| FAB | Fundación Amigos de los Bosques |
| FAB | Fixed Action Button |
| FAB | Faculty Advisory Board (various schools) |
| FAB | Finance and Business (various organizations) |
| FAB | Field Artillery Battalion (US Army) |
| FAB | Fairmount Area Business Association (Philadelphia, PA) |
| FAB | Flex Ajax Bridge (software; Adobe) |