| Acronym | Definition |
|---|
| AHA➣American Heart Association |
| AHA➣American Hospital Association |
| AHA➣Alcohol Health Alliance (UK) |
| AHA➣ASEAN (Association of Southeast Asian Nations) Humanitarian Assistance |
| AHA➣Alpha Hydroxy Acid |
| AHA➣American Historical Association |
| AHA➣Athletes Helping Athletes (various locations) |
| AHA➣American Homebrewers Association |
| AHA➣Ayaan Hirsi Ali (foundation; New York) |
| AHA➣Academy of the Holy Angels |
| AHA➣Architecture and History of Art (UK) |
| AHA➣Arabian Horse Association (Aurora, Colorado) |
| AHA➣Adult Hockey Association (various locations) |
| AHA➣American Humanist Association |
| AHA➣American Humane Association |
| AHA➣Australian Hotels Association (Australia; est. 1839) |
| AHA➣Advocates for Health in Action (North Carolina) |
| AHA➣Artists Helping Artists |
| AHA➣American Health Association |
| AHA➣American Hippotherapy Association |
| AHA➣Ancient History and Archaeology (various locations) |
| AHA➣Adaptec Host Adapter |
| AHA➣Accelerated Hub Architecture |
| AHA➣American Heritage Academy (various locations) |
| AHA➣Acetohydroxamic Acid (chemistry) |
| AHA➣American Hereford Association |
| AHA➣At Home America (home decorating accessories) |
| AHA➣American Hardboard Association (Palatine, Illinois) |
| AHA➣Animal Health Act (UK) |
| AHA➣Antihyperglycemic Agent |
| AHA➣American Homeowners Association |
| AHA➣Australian Healthcare Association |
| AHA➣African Humanitarian Action |
| AHA➣Anesthesia History Association |
| AHA➣American Homeschool Association |
| AHA➣Ammunition Holding Area |
| AHA➣After Hours Activities (various organizations) |
| AHA➣American Hyperlexia Association |
| AHA➣Activity Hazard Analysis |
| AHA➣Alert Holding Area (Army definition) |
| AHA➣Association of HIVAIDS (Haiti) |
| AHA➣American Hypnosis Association |
| AHA➣Airport Handling Agents |
| AHA➣Admins Helping Admins (gaming leagues) |
| AHA➣Altoona Housing Authority (Altoona, PA) |
| AHA➣Aerial Head Assembly (combat) |
| AHA➣Area Hazard Analysis |
| AHA➣Air Alpha Greenland (ICAO code) |
| AHA➣Anger Hostility Aggression |
| AHA➣American Hardwood Association |
| AHA➣Arrived Holding Area |
| AHA➣American Helicopter Association |
| AHA➣Animal Health Auxiliary |
| AHA➣Albert Hydeman Associates |
| AHA➣Alberta Handgun Association |
| AHA➣Analog Headend Assembly |
| AHA➣Assembly Hazard Analysis |
| AHA➣Automated Historical Archives |
| AHA➣Algorithmes Hybrides et Adaptatifs (French: Adaptive and Hybrid Algorithms) |
| AHA➣Alexander Hancock Associates (Davidson, NC) |
| AHA➣Avon Health Authority (UK) |
| AHA➣Assessment of Human Agency (Penn State University) |