| Acronym | Definition |
|---|
| TSTL➣Thus Saith the Lord |
| TSTL➣Too Stupid To Live |
| TSTL➣The Sky's the Limit (christian youth camp) |
| TSTL➣To Say the Least |
| TSTL➣Thread Safe Template Library |
| TSTL➣Transmission Systems Test Lab |
| TSTL➣Turbine Surface Technologies Limited (UK) |