| Acronym | Definition |
|---|
| HH | Hamburg (Germany) |
| HH | Hand-Held |
| HH | Half-Height |
| HH | Högskolan I Halmstad (Halmstad University, Sweden) |
| HH | Coast Guard Helicopter |
| HH | Half-Half (scheduling scheme) |
| HH | Habbo Hotel (online chat) |
| HH | Hatboro Horsham (Senior High School, Horsham, PA) |
| HH | Half Hard |
| HH | Hamilton Heights (High School) |
| HH | Halton Hills |
| HH | Howard Hewett (musician) |
| HH | Heads-Heads (possible outcome for flipping a coin twice) |
| HH | Hentai Heaven (anime) |
| HH | Her Holiness |
| HH | Horizontal Transmit, Horizontal Receive (polarization) |
| HH | Hamerschlag Hall (Carnegie Mellon University) |
| HH | Hershey Highway (Route 322, Dauphin County, PA) |
| HH | Hello Handsome |
| HH | Hollywood Hijinx (Commodore 64 game) |
| HH | Horizontal, Horizontal Polarization |
| HH | Hinging Hyperplanes |
| HH | Higginson Hall (WWU) |
| HH | Hanger Height (flange) |
| HH | Hyperbolic Horn |
| HH | Heat Homing |
| HH | HEED (Health, Education and Economic Development) Handicraft (Bangladesh) |
| HH | Hodgkin-Huxley (mathematics) |
| HH | Honor Harrington (Honor Harrington science fiction novels) |
| HH | Hoosier Hospitality |
| HH | Help Haiti |
| HH | Health for Humanity (National Spiritual Assembly of the Bahá'ís of the United States) |
| HH | Head Honcho |
| HH | Hex Head (screws) |
| HH | Holy Hell (band) |
| HH | Hoosier Healthwise (Indiana state-sponsored health care program) |
| HH | Hostile Hospital (Lemony Snicket) |
| HH | Happy Hunting |
| HH | Harbor Hills |
| HH | Home Health Care |
| HH | Hi Honey |
| HH | Herbig-Haro |
| HH | Hi-Hat (cymbal) |
| HH | Hanseatic City of Hamburg (Hansestadt Hamburg, German City) |
| HH | Happy Hour |
| HH | Henry Hudson (explorer) |
| HH | Hardcore Holly (pro-wrestler) |
| HH | High Hopes |
| HH | Holding Hands |
| HH | High Humidity (water vapor measurement) |
| HH | Hit Hard (basebasll statistic) |
| HH | Henderson Hall |
| HH | Her Highness |
| HH | Hereditary Hemochromatosis |
| HH | Hilton Head |
| HH | His Holiness |
| HH | Hold Harmless |
| HH | Hour |
| HH | Household |
| HH | Hands High (measurement of horses) |
| HH | Hard of Hearing |
| HH | Health Hazard |
| HH | Hip Hop |
| HH | Hypothalamic Hamartoma |
| HH | Helly Hansen |
| HH | Hershey's Hugs (chocolate candy) |
| HH | High Honors |
| HH | Hardcore Hell (pro wrestling) |
| HH | Heil Hitler |
| HH | Hawthorne Heights (band) |
| HH | Horizontal Hostility (workplace behavior) |
| HH | Herbert Hoover |
| HH | Helen Hunt |
| HH | Helen Hayes |
| HH | Hiatus Hernia (medical) |
| HH | Heavily Hinged (philatelic auction term) |
| HH | His Highness |
| HH | Hulk Hogan |
| HH | High Hurdles (track and field) |
| HH | Hypogonadotropic Hypogonadism |
| HH | Haunted House (game) |
| HH | Hon Hai Precision Industry Co. Ltd |
| HH | Happy Holidays |