| Acronym | Definition |
|---|
| TH | Thursday |
| TH | Tommy Hilfiger |
| TH | Townhouse (real estate) |
| TH | Thailand (TLD) |
| TH | Tom Hanks (actor) |
| TH | Theater |
| TH | Trailer Hitch (various companies) |
| TH | Touhou Project |
| TH | Tokio Hotel (German band) |
| TH | Tony Hawk (skateboarder) |
| TH | Texas Hold 'Em (poker game) |
| TH | Trojan Horse |
| TH | Threshold (value of relative length or relative area to determine SRC) |
| TH | Table Header (HTML Tag) |
| TH | Terre Haute (Indiana) |
| TH | Time Horizon |
| TH | Tree Hugger |
| TH | Talking Heads (band) |
| TH | Temporary Housing |
| TH | Tim Horton |
| TH | Transitional Housing (California) |
| TH | Trail Head (hiking) |
| TH | True High |
| TH | Tokyo Hotel (band) |
| TH | Transhuman |
| TH | Tyrosine Hydroxylase |
| TH | Tom Hayden (politican) |
| TH | Total Hardness (of water, aka: General Hardness) |
| TH | Transport Helicopter |
| TH | Trouble History |
| TH | Thermal-Hydraulic (nuclear reactors) |
| TH | The Hobbit (JRR Tolkien book) |
| TH | Telegraph Herald (Dubuque, IA; newspaper) |
| TH | Thyroid Hormone |
| TH | Thorium |
| TH | Therm |
| TH | Talking Head (broadcasting) |
| TH | Thierry Henry (soccer player) |
| TH | Technological Hazards (US FEMA) |
| TH | True Heading |
| TH | Truck Highway |
| TH | Thanatos (Latin: Death, epigraphy) |
| TH | Tariff Heading |
| TH | Trusted Host (informatics) |
| TH | Terapeutas Holísticos (Portuguese: Holistic Therapists) |
| TH | Tee Hee |
| TH | Technische Hochschule (German: University on Engineering) |
| TH | Through Hole (soldering and electronic engineering machinery) |
| TH | Teen Help |
| TH | Helper T Cells |
| TH | Tomlinson-Harashima Precoding |
| TH | Thunderhill (Manitoba, Saskatchewan) |
| TH | Territory of Hawaii (before Hawaii became a state) |
| TH | Thermie |
| TH | Tekniska Högskolan (Helsinki University of Technology) |
| TH | Token Hire |
| TH | Thermite Bomb (US Navy) |
| TH | Thiostrepton |
| TH | Tapped Horn (audio equipment) |
| TH | Test Healthy |
| TH | Tactile Hallucinations (psychiatric assessment) |
| TH | Tails-Heads (possible outcome for flipping a coin twice) |
| TH | Terminal Homing |
| TH | Terminal Handler |
| TH | Telemetry Head |
| TH | Tyrosine Hydrocylase |