AHD

AHD or Ahd may refer to:

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
 * 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.