| Acronym | Definition |
|---|
| MASD➣Montoursville Area School District (Montoursville, PA) |
| MASD➣Mutually Assured Self-Destruction (doctrine) |
| MASD➣Meyersdale Area School District (Pennsylvania) |
| MASD➣Mechanicsburg Area School District (Pennsylvania) |
| MASD➣McKeesport Area School District |
| MASD➣Moisture-Associated Skin Damage |
| MASD➣Mohawk Area School District (Pennsylvania) |
| MASD➣Mercer Area School District (Pennsylvania) |
| MASD➣Mars Area School District (Pennsylvania) |
| MASD➣Mukwonago Area School District (Wisconsin) |
| MASD➣Military Aircraft Storage and Disposition |
| MASD➣Military Assistance to Stabilisation and Development (UK) |