| Acronym | Definition |
|---|
| TTN | Technology Transfer Network |
| TTN | Tandem Tie Line Network |
| TTN | Tool Tip Notification |
| TTN | Titin |
| TTN | Transient Tachypnea of the Newborn |
| TTN | Total Traffic Network |
| TTN | Tellwise Nutshell |
| TTN | Technology Transfer Node |
| TTN | Trenton, NJ, USA - Mercer County (Airport Code) |
| TTN | Técnico do Tesouro Nacional (Brazil) |
| TTN | The Temple News (Temple University newspaper) |
| TTN | Transportation Tracking Number (USTRANSCOM) |
| TTN | Tetrathianaphthalene |
| TTN | Threshold Task Number |
| TTN | Telecom Trading Network (NAATD) |
| TTN | Transnational Terrorist Network (military/government term) |
| TTN | Tokyo Telecommunications Network |