| Acronym | Definition |
|---|
| MSSD➣Model Secondary School for the Deaf (Washington, DC) |
| MSSD➣Ministry of State for Social Development (Canada) |
| MSSD➣Minimum Safe Separation Distance |
| MSSD➣Mountain State Schoolbook Depository (Clearfield, UT) |
| MSSD➣Mineral Springs School District (Mineral Springs, AR) |
| MSSD➣Minimum Stopping Sight Distance (road design) |