| Acronym | Definition |
|---|
| BLB | Blue Letter Bible |
| BLB | Bad Luck Brian (Internet meme) |
| BLB | Block Level Backup |
| BLB | Black Light Blue (lamp) |
| BLB | Bayerische Landesbank (German) |
| BLB | Betting Levy Board (Trinidad and Tobago) |
| BLB | Bacterial Leaf Blight |
| BLB | Black Light Bulb (UV lamp) |
| BLB | Balboa, Panama (airport code) |
| BLB | Brigade Légère Blindée (French: Light Armored Brigade) |
| BLB | Brioches la Boulangere (French cycling team) |
| BLB | Bonnasse Lyonnaise de Banque (French bank) |
| BLB | Bering Land Bridge (archaeology) |
| BLB | Black Legend Brown (band) |
| BLB | Beau Lac de Bâle (French; Swiss band) |
| BLB | British Linen Bank |
| BLB | Blekinge Läns Bildningsförbund (Sweden) |
| BLB | Blind Leading the Blind Foundation |
| BLB | Brewers League Baseball (gaming) |
| BLB | Big Lake Bank (Big Lake, TX) |