| Acronym | Definition |
|---|
| ALD | Atomic Layer Deposition (method to produce conformal thin films) |
| ALD | Adults with Learning Disabilities |
| ALD | Adults with Learning Difficulties (social services) |
| ALD | Alderman |
| ALD | Adrenoleukodystrophy (genetic disease) |
| ALD | At a Later Date |
| ALD | Atomic-Layer Deposition |
| ALD | Alcohol(ic) Liver Disease |
| ALD | Alderson (Amtrak station code; Alderson, WV) |
| ALD | Arapahoe Library District (Englewood, CO) |
| ALD | Association of Lighting Designers |
| ALD | Administrative Law Division (various locations) |
| ALD | Affection de Longue Durée (French: Long Term Illness) |
| ALD | Assistive Listening Device |
| ALD | Alpha Lambda Delta (National freshman honors society) |
| ALD | Assistant Laboratory Director |
| ALD | Airborne Laser Designator (US DoD) |
| ALD | Academy of Laser Dentistry |
| ALD | Alderney |
| ALD | Angular Light Distribution |
| ALD | Advanced Logistics Development (various companies) |
| ALD | Arakan League for Democracy |
| ALD | À l'Attention De |
| ALD | Anoxic Limestone Drain (passive treatment for remediation of acid mine drainage) |
| ALD | American Library Directory |
| ALD | Available-to-Load Date |
| ALD | Approximate Lethal Dose |
| ALD | Assistant Lighting Designer (theatre) |
| ALD | Appointment of Limited Duration |
| ALD | Available Landing Distance (aviation) |
| ALD | American Law Division (Congressional Research Service) |
| ALD | Acoustic Leak Detection |
| ALD | Arch Length Discrepancy (dentistry) |
| ALD | Accounting Line Designator |
| ALD | Alarm Display |
| ALD | Aviation Logistics Department |
| ALD | Analog Line Driver |
| ALD | Arrêt Longue Durée |
| ALD | Acquisition Logistics Division |
| ALD | Airborne Laser Demo |
| ALD | Air Lift Division |
| ALD | Aviation Logistics Division |
| ALD | Assembly Line Diagram |
| ALD | Azimuthal Lithodensity (trademark of Halliburton) |
| ALD | Assign Local Distribution |
| ALD | Advanced Laser Designator |
| ALD | Average Link Duration |
| ALD | Accelerated Life Data |
| ALD | Automatic Louver Damper (HVAC systems) |
| ALD | Automatic Logic Diagram |
| ALD | Acquisition Logistics Documents |
| ALD | Aircraft Logistics Department |
| ALD | Available-to-Load Data |