| Abbreviation | Definition |
|---|---|
| MARF | Medical Acupuncture Research Foundation |
| MARF | Mesothelioma Applied Research Foundation |
| MAWFI | Make A Wish Foundation International |
| MBCF | Martin Bayless Charitable Foundation |
| MBCF | Millard Business Community Foundation |
| MBEF | Manhattan Beach Education Foundation |
| MBEF | Master Builders Education Foundation |
| MBF | Maine Bar Foundation |
| MBF | Massachusetts Bar Foundation |
| MBF | Medical Benevolence Foundation |
| MBFF | Muggsy Bogues Family Foundation |
| MBFF | My Biggest Fan Foundation |
| MBIF | Minnesota Building Industry Foundation |
| MBIF | Mwinyi Baraka Islamic Foundation |
| MBRF | McKnight Brain Research Foundation |
| MCBF | Middlesex County Bar Foundation |
| MCCF | Marquette County Community Foundation |
| MCCF | Marshall County Community Foundation |
| MCCF | McHenry County Community Foundation |
| MCCF | McPherson County Community Foundation |