TFSL
| Acronym | Definition |
|---|---|
| TFSL | Third Federal Savings and Loan |
| TFSL | Teaching French as a Second Language |
| TFSL | The Food Safety Laboratories (Hong Kong) |
| TFSL | Thompson Financial Services Limited (Lower Hutt, Wellington, New Zealand) |
| TFSL | The Four Spiritual Laws |
| TFSL | Thin-Film Superlattice |