Adl is an Arabic word meaning justice.

Adl or ADL may also refer to:

• IATA airport code for Adelaide Airport in State of South Australia, Australia

• Action description language, a formal language for automatic planning systems
• Adventure Development Language, created by On-Line Systems
• Alder Lake series Intel CPUs
• Archetype definition language, as used in openEHR archetypes
• Architecture description language, a formal language for architecture description and representation
• Argument-dependent name lookup, a lookup for function names in the C++ programming language
• Assertion definition language, a specification language

• ADL astronomical society, Slovenian astronomical society
• Akademiska Damkören Lyran or The Academic Female Voice Choir Lyran, a Finnish choir
• Alexander Dennis Limited, bus manufacturer in Scotland
• Animal Defense League, animal rights organisation in North America
• Anti-Defamation League, a Jewish non-governmental organization based in the US
• Armenian Democratic Liberal Party, a political party
• Arthur D. Little, a management consulting firm

• Aurelio De Laurentiis, filmmaker and president of S.S.C. Napoli

• Adlington (Lancashire) railway station, England, National Rail code ADL
• A demonym for the city of Adelaide, South Australia

• Activities of daily living, a term used in medicine and nursing, especially in the care of the elderly
• Advance–decline line, a stock market indicator
• Advanced Distributed Learning, part of an effort to standardize and modernize training and education management and delivery
• Arena Developmental League, American football league that became the National Arena League
• Gallong language, a Tibeto-Burman language of India
• New Zealand ADL class diesel electric unit, a type of diesel railway vehicle used on Auckland's suburban network

• ADLS (disambiguation)
• ALD (disambiguation)