| Abbreviation | Definition |
|---|---|
| MCLFA | Missouri Chapter of the Lupus Foundation of America |
| MCMF | Margaret Clark Morgan Foundation |
| MCMF | Matt Cwiertny Memorial Foundation |
| MCMF | Montgomery County Muslim Foundation |
| MCMF | Mt Carmel Music Foundation |
| MCSF | Marine Corp Scholarship Foundation |
| MCSF | Marine Corps Scholarship Foundation |
| MCSF | Maryville City Schools Foundation |
| MDEF | Massachusetts Dietetic Education Foundation |
| MDEF | McCall Donnelly Education Foundation |
| MDEF | Mehsana District Education Foundation |
| MDF | Maine Development Foundation |
| MDF | Mule Deer Foundation |
| MDF | Myotonic Dystrophy Foundation |
| MDFI | Maguindanao Development Foundation Inc |
| MDFI | Maguindanaon Development Foundation Inc |
| MDHF | Milton District Hospital Foundation |
| MDHF | Mount Diablo Hospital Foundation |
| MDREF | Metropolitan Detroit Research and Education Foundation |
| MEAF | Mitsubishi Electric America Foundation |