| Acronym | Definition |
|---|
| MTSS➣Multi-Tiered System of Support (education) |
| MTSS➣Ministerio de Trabajo y Seguridad Social (Spanish) |
| MTSS➣Midwest Teen Sex Show (sex education video series) |
| MTSS➣Medial Tibial Stress Syndrome (lower leg injury) |
| MTSS➣Modified Total Sharp Score (radiography) |
| MTSS➣Military Training Service Support |
| MTSS➣Money Transfer Service Scheme (India) |
| MTSS➣Media Technology Support Services (Pennsylvania State University) |
| MTSS➣Manufacturing Test Software Solution |
| MTSS➣Main Traffic Signal System (transportation) |
| MTSS➣Material Toxicity Summary Sheet (product safety) |
| MTSS➣Managed Tiered Security Service |
| MTSS➣MAGTF (Marine Air-Ground Task Force) Training Systems Support (US Marine Corps) |