MGSA
| Acronym | Definition |
|---|---|
| MGSA | Mason Gross School of the Arts (New Brunswick, NJ) |
| MGSA | Melanoma Growth Stimulatory Activity (antigen) |
| MGSA | Modern Greek Studies Association |
| MGSA | Modified Gram-Schmidt Algorithm |
| MGSA | Mansfield Girls Softball Association (Texas) |
| MGSA | Maryland Ghost & Spirit Association |
| MGSA | Military General Supply Agency |
| MGSA | Mid Georgia Software Associates, LLC |