| Acronym | Definition |
|---|
| TACN➣Triazacyclononane |
| TACN➣Texas Association of Christian Networks (prayer network) |
| TACN➣Toyota Automobiel Club Nederland (Dutch: Netherlands Toyota Automobile Club; est 1992) |
| TACN➣Turkish Association for the Conservation of Nature |
| TACN➣Tactical Air Control Net |
| TACN➣Tactical Area Communications Network(s) |
| TACN➣The Amazing Captain Neato (bulletin board system) |
| TACN➣TetrAmine Copper Nitrate |