| Acronym | Definition |
|---|
| IH | International Harvester |
| IH | Interstate Highway |
| IH | International House (world organisation) |
| IH | In-House |
| IH | Inguinal Hernia |
| IH | Induction Heating |
| IH | Indian Hills (College in Iowa) |
| IH | Intracranial Hypertension |
| IH | Incredible Hulk (comic character) |
| IH | Institute of Hydrology (UK) |
| IH | Intermittent Hypoxia |
| IH | Information Highway |
| IH | Hold Current (maximum current a fuse will pass without interruption) |
| IH | Infectious Hepatitis |
| IH | Immersion Heater |
| IH | Intermediate Host (life cycle of parasites) |
| IH | Intense Hurricane |
| IH | Icelandic Horse |
| IH | Integrated Humanities (schools) |
| IH | Információs Hivatal (Information Office, Hungary; since 1989) |
| IH | Individual History |
| IH | Inner Housing |
| IH | Idiopathic Hemihypertrophy |
| IH | Initial Heading |
| IH | Improved Hawk |
| IH | Idiopathic Hyperventilation |
| IH | Inert Head |
| IH | Industrial Hygienist/Hygiene |
| IH | Independent Holder (classified documents/material) |
| IH | Intercomputer Handler |
| IH | Instituti I Hitorisë (Albanian: Institute of History in Kosova) |