TSY
| Acronym | Definition |
|---|---|
| TSY | The Selvedge Yard (pop culture website) |
| TSY | Tusayan (Amtrak station code; Tusayan, AZ) |
| TSY | The Sophomore Year (band) |
| TSY | Technology Systems (Bellcore) |
| TSY | The Satellite Year (band) |
| TSY | Telephony Subsystem |
| TSY | Tryptone Soya Yeast Extract (food microbiology) |