| Acronym | Definition |
|---|
| MSSN➣Mission (street suffix) |
| MSSN➣Military Spouse Support Network |
| MSSN➣Muslim Students' Society of Nigeria |
| MSSN➣Muslim Spiritual Support Network (University of Cincinnati; Ohio) |
| MSSN➣Masters Scottish Strongman Nationals (UK) |
| MSSN➣Manufacturing & Specialist Support Network |