THH Views 8 meanings found THH may indicate The Hardwood and Hardware Company, a supplier of building materials, or The Hillingdon Hospital, a medical facility in the UK, among other community uses. Medical The Hillingdon Hospital Miscellaneous Tee Hee Hee Taper Hall of Humanities Toy Hauln Hooligans Tong Ho Hsing Community Therapeutic Horsemanship of Hawaii Regional Taharoa, New Zealand Business The Hardwood and Hardware Company