| 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) |