AHD
AHD or Ahd may refer to:
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Linguistics
- Althochdeutsch (Ahd.), the German name for Old High German
- The American Heritage Dictionary of the English Language
Medicine
- Alveolar hydatid disease, a parasitic disease
- Arteriosclerotic heart disease, a buildup of plaque in arteries leading to the heart
Other uses
- Acoustic Hailing Device, a high-powered loudspeaker for communicating at long distances
- Ahd Party, a Jordanian political party
- Analog High Definition, a standard for transmitting high-definition analog video
- Ardmore Downtown Executive Airport, Oklahoma, US, IATA code AHD
- Artificial High Directional, a portable system used in rescue operations and rope access work to elevate rope lines above edges, obstructions, railing, walls, and other challenging terrain
- Ashtead railway station, Surrey, England, station code
- Audio High Density, a digital disc format
- Australian Height Datum, a standard for measuring heights relative to landforms, tides, etc.