| Acronym | Definition |
|---|
| TSEI➣Transportation Safety Equipment Institute |
| TSEI➣Team Sports Entertainment Inc. (now Idea Sports Entertainment Group, Inc.) |
| TSEI➣Total Skin Electron Irradiation |
| TSEI➣Total Sports & Entertainment India Pvt. Ltd. |
| TSEI➣Truck Safety Equipment Institute |
| TSEI➣Technical Support Engineer I (job title) |