| Acronym | Definition |
|---|
| TIW | Telesystem International Wireless |
| TIW | Telesystem International Wireless Inc. (Canada) |
| TIW | Trade Information Warehouse |
| TIW | Titanium Tungsten |
| TIW | Tropical Instability Wave (climate science) |
| TIW | Thermo Informatics World (conference) |
| TIW | There I Was... (slang; an embellished story follows) |
| TIW | Triple-Insulated Wire |
| TIW | The Insurance Workplace |
| TIW | Texas Iron Works (Waco, TX) |
| TIW | Three Times in a Week |
| TIW | Toronto Iron Works |
| TIW | Tactical Intelligence Wing (USAF) |
| TIW | Tactical IMINT (Imagery Intelligence) Wing (Royal Air Force; UK) |
| TIW | Teacher is Watching (chat) |