| Acronym | Definition |
|---|
| BEF | Bonneville Environmental Foundation |
| BEF | Before |
| BEF | British Equestrian Federation (UK) |
| BEF | Biodiversity and Ecosystem Functioning |
| BEF | British Expeditionary Force |
| BEF | Business Enterprise Fund (UK) |
| BEF | Boomer Esiason Foundation (Cystic Fibrosis organization) |
| BEF | Baltic Environmental Forum |
| BEF | Biomass Energy Foundation |
| BEF | Befehl (German military) |
| BEF | Belgian Francs (former currency code; now EUR) |
| BEF | Ballast Efficiency Factor (lighting) |
| BEF | Bartlett Experimental Forest (New Hampshire; USDA) |
| BEF | Brightness Enhancement Film (optical systems; 3M) |
| BEF | Band Elimination Filter |
| BEF | Basic Education Finance (Washington) |
| BEF | British Electric Foundation (musical group which later became Heaven 17) |
| BEF | Bonus Expeditionary Force |
| BEF | Bovine Ephemeral Fever |
| BEF | Billiard Education Foundation |
| BEF | Bassin d'Education et de Formation (French: Watershed Education and Training) |
| BEF | Business Education Forum |
| BEF | Brevet d'Entraineur Fédéral (French coaching certification) |
| BEF | Bureau de l'Education Française (French: Bureau of French Education; Canada) |
| BEF | Bund Europäischer Farbberater |
| BEF | Bulgaria Economic Forum |
| BEF | Brewster Education Foundation (Brewster, NY) |
| BEF | Big-Eyed Fish (Dave Matthews Band song) |
| BEF | Biogéochimie des Ecosystèmes Forestiers (French: Biogeochemistry of Forest Ecosystems) |
| BEF | Barrington Education Foundation |
| BEF | Bureau de l'Egalité Hommes-Femmes et de la Famille (French: Office of Gender Equality and Family; Switzerland) |
| BEF | Bovine Epizootic Fever (aka Bovine Ephemeral Fever) |
| BEF | Baseline Engagement Force |
| BEF | Basic English Foundation |
| BEF | Beady Eye Factor |
| BEF | Belgian Elite Force (gaming clan) |
| BEF | Burlington Education Foundation |
| BEF | Bottom End Fitting |
| BEF | Benefits Enrollment Form |
| BEF | Base Engagement Force (TAA) |
| BEF | Bibliographie des Ecrivains Français (French: Bibliography of French Writers) |
| BEF | Best Estimate Flow |
| BEF | Back-End Final |
| BEF | Britanina Elite Forces |
| BEF | Band-Edge Filtering |
| BEF | Big Error Factory |
| BEF | Bureau of Enterprise Fleet |
| BEF | Burwen Education Foundation (Mountain View, CA) |
| BEF | Bureau d'Etudes Forézien (French: Forezian Design Office; Saint Etienne, France) |
| BEF | Barrier Evaluation Form (Washington) |