| Abbreviation | Definition |
|---|---|
| BIT | Brampton Intermodal Terminal |
| BITES | Buildings Industry Transportation and Electricity Scenarios |
| BIWTA | Bangladesh Inland Water Transportation Authority |
| BL | Barrier Light |
| BL | Battle Level |
| BL | Belt Line |
| BL | Bicycle Lane |
| BL | Bill of Lading |
| BLA | Bicycle Lane Ahead |
| BLAZER | As in a model of a Chevrolet |
| BLE | Bicycle Lane Ends |
| BLT | Basic Loaded Touring |
| BLTB | Berkshire Local Transport Body |
| BLU | Bulk Loading Unloading |
| BLVD | Boulevard |
| BM | Barrier Machine |
| BM | Big Mother |
| BM | Birelli Motoroli |
| BM1 | Boatswain's Mate First Class |
| BM3 | Boatswain's Mate Third Class |