| Abbreviation | Definition |
|---|---|
| MBDA | Minnesota Band Directors Association |
| MBFA | Multiple Birth Families Association |
| MBFA | Multiple Births Families Association |
| MBGA | Michigan Boer Goat Association |
| MBGA | Myrtle Beach Golf Association |
| MBHA | Michigan Bear Hunters Association |
| MBHA | Mixed Barbershop Harmony Association |
| MBHA | Mothers and Babies' Health Association |
| MBIA | Maryland Building Industry Association |
| MBIA | Maryland Business Incubation Association |
| MBIA | Michigan Boating Industries Association |
| MBIA | Michigan Boiler Inspectors Association |
| MBIA | Missoula Building Industry Association |
| MBIA | Montana Building Industry Association |
| MBIA | Municpal Bond Insurance Association |
| MBLA | Man and Boy Love Association |
| MBLA | Man Boy Lovers Association |
| MBLA | Massachusetts Black Lawyers Association |
| MBLA | McGill Business Law Association |
| MBLA | Mississippi Biomedical Library Association |