| Acronym | Definition |
|---|
| HDH | High Density Housing (various organizations) |
| HDH | Hotel Dieu Hospital (Ontario, Canada) |
| HDH | Henrico Doctors' Hospital (Richmond, VA) |
| HDH | Holland Dozier Holland |
| HDH | Dillingham Airfield (north shore of Oahu near the community of Waialua) |
| HDH | Herrera, Davis, Holland (bullpen pitchers; Kansas City Royals; Kansas City, MO) |
| HDH | HDLC Distant Host |
| HDH | Humidification-Dehumidification (desalination method) |
| HDH | Hawaii Department of Health |
| HDH | High Dollar Hooker |
| HDH | Harper Dennis Hobbs (UK) |
| HDH | His Divine Holiness |
| HDH | Harry & David Holdings (Medford, OR) |
| HDH | Home Dear Home |