| Acronym | Definition |
|---|
| STSR | Sotaisei Riron (Japanese band) |
| STSR | South Texas Soccer Referees, Inc. |
| STSR | Surgical Technologist in the Scrub Role (healthcare) |
| STSR | Spanish Trail Scout Reservation (est. 1961; Gulf Coast Council; Boy Scouts of America; Pensacola, FL) |
| STSR | Secondary Traumatic Stress Response (psychology) |
| STSR | Society to Save Rocks (geologic formations preservation group; Hyderabad, Andhra Pradesh, India) |
