ALD

ALD or Ald may refer to:

Medicine, science and technology

 * Adrenoleukodystrophy, a disease linked to the X chromosome
 * Alcoholic liver disease
 * Aldolase or ALD, an enzyme occurring naturally in animals
 * Assistive listening device used to improve hearing ability
 * Atomic layer deposition, a thin-film deposition technique
 * Asymmetric Laplace distribution, in probability theory and statistics

Places

 * Alderley Edge railway station, Cheshire, UK (National Rail code ALD)
 * Alderney, a Channel Island, Chapman code
 * Alderson station, West Virginia, US (Amtrak station code ALD)
 * Allahabad Junction railway station, Uttar Pradesh, India (station code ALD)
 * Alerta Airport, Peru (IATA code ALD)

Politics

 * Autonomy Liberty Democracy, a coalition of centre-left political parties in Aosta Valley, Italy
 * Arakan League for Democracy, a political party active in Rakhine State, Myanmar (Burma)

Businesses

 * Aimé Leon Dore, American fashion brand
 * ALD Automotive, a French fleet managing and operational car leasing company

Other uses

 * Ald (unit), an old Mongolian measure equal to the length between a man's outstretched arms
 * Alderman, a member of a municipal assembly or council
 * Assistant lighting designer, in the theatre
 * Oxford Advanced Learner's Dictionary
 * ALD, the Liberty dollar (private currency)