| Acronym | Definition |
|---|
| THH | Toyota Highlander Hybrid (car) |
| THH | Trigger Happy Havoc (gaming; Danganronpa) |
| THH | The Hillingdon Hospital (Uxbridge, Middlesex, UK) |
| THH | Taper Hall of Humanities (University of Southern California; Los Angeles, CA) |
| THH | Thomas Henry Huxley (biologist) |
| THH | Thalamic Hypertensive Hemorrhage (stroke) |
| THH | Therapeutic Horsemanship of Hawaii (Waimanalo, HI; disabled riding lessons) |
| THH | Tropical Hardwood Hammock (ecosystem) |
| THH | Tripterygium Hypoglaucum Hutch (Chinese herbal medicine) |
| THH | Targetoid Haemosiderotic Haemangioma (tumor) |
| THH | Tree Huggin' Hippy |