| Acronym | Definition |
|---|
| MBL | Macquarie Bank Limited |
| MBL | Mobile |
| MBL | Marine Biological Laboratory |
| MBL | Medical & Biological Laboratories (Japan) |
| MBL | Mannose-Binding Lectin |
| MBL | Master of Business Leadership (various locations) |
| MBL | Metro Baseball League (various locations) |
| MBL | Mortgage Broker/Lender (license) |
| MBL | Master Business License |
| MBL | Msn Back Links |
| MBL | Microsoft Business License |
| MBL | Model-Based Library |
| MBL | Member Business Lending (credit unions) |
| MBL | Marine Boundary Layer |
| MBL | Metallo Beta Lactamase |
| MBL | Movimiento Bolivia Libre (Movement Free Bolivia) |
| MBL | Molecular Biology Laboratory |
| MBL | Menstrual Blood Loss |
| MBL | Monoclonal B-Cell Lymphocytosis |
| MBL | Minimum Breaking Load (wire rope specification) |
| MBL | Mountain Bike Leader |
| MBL | Mold & Bacteria Consulting Laboratories (Canada) |
| MBL | Mean Breaking Load |
| MBL | Master Bill of Lading (shipping/logistics) |
| MBL | Manistee, MI, USA - Manistee Blacker Airport (Airport Code) |
| MBL | Montebello Bus Lines (Montebello, CA) |
| MBL | Maximum Broken Load |
| MBL | Married But Looking |
| MBL | Mensa Belgium-Luxemburg |
| MBL | Minimum Baseline |
| MBL | Massachusetts Bay Lines |
| MBL | Main Bitline (computer memory) |
| MBL | Mean Burst Location (artillery; US DoD) |
| MBL | Maximum Branching Level |
| MBL | Mieter- und Bürgerliste (Local Party in Halle, Germany) |
| MBL | Main Battle Line |