| Acronym | Definition |
|---|
| MCSN➣Mass Communication Specialist Seaman (US Navy) |
| MCSN➣Musical Copyright Society of Nigeria (Lagos, Nigeria) |
| MCSN➣Maryland Charter School Network (Baltimore, MD) |
| MCSN➣Military Community Services Network |
| MCSN➣Malaysian Christian Songwriters Network |
| MCSN➣Monitoring Cell Sequence Number |
| MCSN➣Montana Conservation Seedling Nursery |