| Acronym | Definition |
|---|
| MDSA | Musical Dog Sport Association |
| MDSA | Mother-Daughter Sexual Abuse |
| MDSA | Making Daughters Safe Again |
| MDSA | Mid-Day Supervisor Assistant (UK) |
| MDSA | Multi-Sensor Data Synergy Advisor (earth science) |
| MDSA | Mount de Sales Academy (various locations) |
| MDSA | Macedonian Dentistry Students' Association |
| MDSA | Michigan Directors of Services to the Aging |
| MDSA | Movement Disorder Society of Australia (Nedlands, WA) |
| MDSA | Managing Director Senior Advisor |
| MDSA | Multiple Disk Sampling Apparatus |
| MDSA | Minnewaska Distance Swimmers Association (New Paltz, NY) |
| MDSA | Missouri Sheriffs Department Association |