| Acronym | Definition |
|---|
| HF | Half |
| HF | High Frequency (3-30 MHz; 100-10m) |
| HF | Heart Failure |
| HF | Hydrogen Fluoride |
| HF | Half Life (game) |
| HF | Hedge Fund |
| HF | Handsfree |
| HF | Hafnium |
| HF | High Fidelity |
| HF | Have Fun |
| HF | High Functioning |
| HF | Hot Fix |
| HF | Hartree-Fock |
| HF | Harrison Ford |
| HF | Harvest Festival (various organizations) |
| HF | Holland Festival (est. 1947) |
| HF | Harbor Freight |
| HF | Halogen Free |
| HF | Hyperfiltration |
| HF | Historisk-Filosofiske Fakultet (Department of Arts, University of Oslo, Norway) |
| HF | Hellfire (antiarmor, laser guided, air-to-ground weapon) |
| HF | Heritage Foundation |
| HF | Human Factor(s) |
| HF | Hyperfine |
| HF | Hack Forum (anime) |
| HF | Hip Fracture |
| HF | High Five (internet gaming) |
| HF | Horizontal Flight (aviation) |
| HF | Hemorrhagic Fever |
| HF | Happy Face |
| HF | Hlutafelag (Icelandic corporate designation) |
| HF | Helicopter Flight |
| HF | Huck Finn (book) |
| HF | Hot Finish (steel) |
| HF | High Force |
| HF | Heroic Fantasy |
| HF | Hard Failure |
| HF | Hyper Fighting (Street Fighter: Hyper Fighting game) |
| HF | Hydroflouric (Acid) |
| HF | Hageman Factor |
| HF | Home Fleet (British, WWII) |
| HF | Height Finder |
| HF | Human Failure |
| HF | Hydrogen Fill |
| HF | Habitat Fragmentation (conservation biology) |
| HF | Hazard Function |
| HF | Hapag Lloyd Flug (IATA airline code) |
| HF | Házi Feladat (Hungarian: homework) |
| HF | Hidden Frontier (Star Trek internet-based fanfilm) |
| HF | Haze Filter |
| HF | Height-Finding (radar) |
| HF | Horizontal Fusion |
| HF | High Forage |
| HF | Hyperfile |
| HF | Honda Foundry Co., Ltd. (Japan) |
| HF | Harlequin Fetus |
| HF | Harassing Fire |
| HF | Hormone Foundation |
| HF | Habbo Forum |
| HF | Harmony Foundation |
| HF | Hydro Foil |
| HF | Honor Farm (Alabama prison program) |
| HF | Hazards Forum |
| HF | Failed in the House (defeated business of the House of Representatives, North Carolina) |
| HF | Hellforge (gaming, Diablo 2) |
| HF | House Forsaken (gaming guild) |
| HF | Handling Fixture |
| HF | Hammer Forum |
| HF | Hydraulfunktion (Swedish electrohydraulics manufacturer) |
| HF | HomeLAN Federation (gaming administrators) |
| HF | Hinkle Fieldhouse (Indiana) |
| HF | Harrier Force |
| HF | Hemochromatosis Foundation |
| HF | Hazard of Failure |
| HF | Head Foreman |
| HF | Hybridization Factor |
| HF | Housefellow |
| HF | Holmesdale Fanatics (football ultras group) |
| HF | Holy Fudge (polite form) |
| HF | Hatof Foundation |
| HF | HostForce |
| HF | Heredes Fecerunt (Latin: His/Her Heirs Made, epigraphy) |
| HF | Heres Fecit (Latin: His/Her Heir Made, epigraphy) |
| HF | Hull Fitter |
| HF | Hold For/Held For |