| Acronym | Definition |
|---|
| ASH | Action on Smoking and Health |
| Ash | Ashley |
| ASH | American Society of Hematology |
| ASH | A Shell |
| ASH | Academy of the Sacred Heart (Louisiana) |
| ASH | American Society of Hypertension |
| ASH | Actualités Sociales Hebdomadaires (French: Social News Weekly) |
| ASH | Adaptation Scolaire et Scolarisation des Élèves Handicapés (French: Special Education and Education of Disabled Students) |
| ASH | Advanced Scientific Health (research organization) |
| ASH | Anthony Stewart Head (actor) |
| ASH | Assistant Secretary for Health |
| ASH | Asymmetric Septal Hypertrophy |
| ASH | Active Session History (performance metrics) |
| ASH | America's Second Harvest (US food bank network) |
| ASH | Atascadero State Hospital |
| ASH | Alcoholic Steatohepatitis |
| ASH | Argyll and Sutherland Highlanders (Scottish Regiment of the British Army) |
| ASH | Austin State Hospital |
| Ash | Ashkun (linguistics) |
| ASH | American School of the Hague (Netherlands) |
| ASH | Allentown State Hospital (Allentown, PA) |
| ASH | Australian Society of Herpetologists |
| ASH | Australian Society of Hypnosis |
| ASH | Amplifier-Sequenced Hybrid |
| ASH | Allele Specific Hybridization |
| ASH | Advanced Scout Helicopter |
| ASH | All-Saints House |
| ASH | Akademia E Shkencave (Albanian: National Academy of Sciences) |
| ASH | Arizona Society of Homebrewers |
| ASH | Application Session Handoff (communications protocol) |
| ASH | Action Sociale par l'Habitat (French: Social Action in Housing) |
| ASH | Airspeed Hold (airplane autopilot mode) |
| ASH | Army Space Heaters |
| ASH | Anti-Self-Homing (torpedoes) |
| ASH | Alternate Support Headquarters |
| ASH | alt.suicide.holidays (USENET newsgroup) |
| ASH | Abortion, Sterilization, and Hysterectomy (medical procedures) |
| ASH | Archaic Sealed Heat (role-playing game) |
| ASH | Agricultural Safety and Health (various organizations) |