| Acronym | Definition |
|---|
| WTU➣Warrior Transition Unit (Army) |
| WTU➣Washington Teachers Union |
| WTU➣Washington Theological Union |
| WTU➣Whitetails Unlimited |
| WTU➣Want to Upgrade (computing) |
| WTU➣Water Treatment Unit (various companies) |
| WTU➣Weighted Teaching Units |
| WTU➣Withholding Tax Update (Wisconsin) |
| WTU➣Write-Through Update (computing) |
| WTU➣Works Training Unit |
| WTU➣Weapons and Tactics Unit |
| WTU➣Ward Test Urine |