| Acronym | Definition |
|---|
| TESN➣Tema di Studio Nazionale (Italian: Theme of National Study) |
| TESN➣Telestone Technologies (China) |
| TESN➣Transition to Employment Services for Newcomer (Canada) |
| TESN➣Tetraethyl Tin |
| TESN➣Tertiary Education Security Network (various locations) |
| TESN➣Travail à l'Eau et Sauvetage Nautique (French: Work on Water and Rescue Boat) |
| TESN➣Toyota Escondido Sports Network (Escondido, CA) |
| TESN➣Tragic Events Support Network (Humber College; Canada) |
| TESN➣Test de Evaluación del Sintagma Nominal (Spanish: Assessment Test Noun Phrase) |