| Acronym | Definition |
|---|
| BSL | British Sign Language |
| BSL | Breed Specific Legislation (dog breeds) |
| BSL | Biosafety Level |
| BSL | Brookdale Senior Living (Brentwood, TN) |
| BSL | Baby Sign Language |
| BSL | Blood Sugar Level |
| BSL | Below Sea-Level |
| BSL | Bank of Sierra Leone |
| BSL | Broad Street Line (Philadelphia subway) |
| BSL | Best Straight Line |
| BSL | Boyne Smelters Limited (QLD, Australia) |
| BSl | Balto-Slavic (linguistics) |
| BSL | Basel, Switzerland - Basel (Airport Code) |
| BSL | Bachelor of Science in Law |
| BSL | Beaver Scout Leader (UK scouting) |
| BSL | Béatrice Saint-Laurent (French art gallery) |
| BSL | Biohazard Safety Level |
| BSL | Bird, Stewart, and Lightfoot (chemical engineering book) |
| BSL | Boost Software License (open source license) |
| BSL | Euro Airport Basel-Mulhouse-Freiburg (cirport code) |
| BSL | Bertinot Sanitaire Location (French portable restroom rental company) |
| BSL | Basic Switching Impulse Insulation Level |
| BSL | Bra Strap Length (hair length) |
| BSL | Blue Starlight (comic) |
| BSL | Blue Screen of Life (Windows NT boot screen) |
| BSL | Biologic Space Labs (Metroid Fusion game) |
| BSL | Baltic Sea Level |
| BSL | Bretagne Services Logistiques (French: Brittany Logistical Services; Brittany, France) |
| BSL | Bachelor of Sacred Literature |
| BSL | Broadway Show League |
| BSL | Bachelor of Science in Linguistics |
| BSL | Batiment de Soutien Logistique (Marine) |
| BSL | Blue Sky Logistics |
| BSL | Bachelor of Science in Languages |
| BSL | Bureau de la Sécurité des Laboratoires (French: Security Bureau of Laboratories; Canada) |
| BSL | Blood Service Letter (American Red Cross Biomedical Services) |
| BSL | Basic Scripting Language |
| BSL | Bordeaux Saint Louis (French employment agency) |
| BSL | Basic Systems List |
| BSL | Biological Scripting Language |
| BSL | Binary Segment Leader |
| BSL | Business Section Layer |
| BSL | Billards Services et Loisirs (French: Billiards and Recreation Services) |
| BSL | Benchmarks for Science Literacy (education) |
| BSL | Business Services Ltd. (various locations) |
| BSL | Business Standard Ltd. (India) |
| BSL | Badger State Logistics (Waupun, WI) |
| BSL | Bright Solutions Logistics (Saudi Arabia) |
| BSL | William S. Boyd School of Law (University of Nevada, Las Vegas) |
| BSL | Bestseller List |