| Acronym | Definition |
|---|
| MDB | Microsoft Access Database (file extension) |
| MDB | Message Driven Bean |
| MdB | Mitglied des Bundestages (German: Member of Parliament) |
| MDB | Modular Debugger |
| MDB | Murray-Darling Basin (South Australia) |
| MDB | Master Database |
| MDB | My Dying Bride (band) |
| MDB | Multilateral Development Bank |
| MDB | Management Database |
| MdB | Movimento Democrático Brasileiro (Brazilian party) |
| mdB | Mit der Bitte (German: With the Request) |
| MDB | Main Distribution Board |
| MDB | Moscow Defense Brief |
| MDB | Mieux se Déplacer à Bicyclette (French: Better Commute by Bicycle) |
| MDB | Marketing Database |
| MDB | Maintenance Database |
| MDB | Multi Drop Bus |
| MDB | Million Dollar Band (University of Alabama, Tuscaloosa, Alabama) |
| MDB | Metalloprotein Database and Browser |
| MDB | Mouvement de Defense de la Bicyclette (French) |
| MDB | Metropolitan Development Board |
| MDB | Murder by Death (band) |
| MDB | Medical Devices Bureau (Health Canada) |
| MDB | My Data Bank (software feature) |
| MDB | Microarray Database |
| MDB | Mutual Defense Board (United States of America and the Republic of the Philippines) |
| MDB | Melbourne Development Board (Melbourne, Australia) |
| MDB | Marc Douglas Berardo (singer/songwriter) |
| MDB | Mestské divadlo Brno (Brno City Theatre; Brno, Czech Republic) |
| MDB | Mission Data Base |
| MDB | Michiel de Boer (artist webstite) |
| MDB | Mesh Database |
| MDB | Basic Metal Detector |
| MDB | Movable Deformable Barrier (automobile crash testing) |
| MDB | Multicast Descriptor Block (Cisco) |
| MDB | Musical Data Bases |
| MDB | Mississippi Delta Blues (Society) |
| MDB | Maintenance Manual Depot With IPB |
| MDB | Management Data Bank |
| MDB | Manufacturing Data Base |
| MDB | Missioni Don Bosco (Italian: Don Bosco Missions) |
| MDB | Maintenance Decision Board |
| MDB | Molecular Diagnostics and Biotechnology |
| MDB | Marsavius Design Bureau |
| MDB | Maximum Delay Bounds |
| MDB | Multiplex Data Bus |
| MDB | Maximum Death Benefit (insurance) |
| MDB | Multipoint Data Bridging |
| MDB | Millennium Dome Bombing |