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
  • 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.