Look up ADD, add, add, or AD&D in Wiktionary, the free dictionary.

ADD is short for attention deficit disorder, and is an older name for attention deficit hyperactivity disorder.

Add or ADD may also refer to:

Entertainment

• A.D.D. (Audio Day Dream), a 2007 album by Blake Lewis
• "A.D.D", a song on the 1998 album Hard to Swallow by Vanilla Ice
• "A.D.D. (American Dream Denial)", a song on the 2002 album Steal This Album! by System of a Down
• “ADD”, a song on the 2017 album Mix & Match by Loona sub-unit Odd Eye Circle
• "ADD", a song on the 2022 album Cave World by Viagra Boys

Science and technology

• Addition, a mathematical operation
• ADD model, a hypothesis in physics
• Agency for Defense Development, a South Korean national research and development agency
• Android Developer Day
• Accumulated degree days, a measure of heating or cooling
• Architectural design document (or sometimes Architectural decision document), part of a software design document
• Automatic dropping device, a safety system for a pantograph
• ADD, a SPARS code appearing on some compact disc recordings
• Androsta-1,4-diene-3,17-dione, an intermediate in hormone synthesis

Transport

• Adderley Park railway station (Station code), Birmingham, England
• Addis Ababa Bole International Airport (IATA code), Addis Ababa, Ethiopia

Other uses

• River Add, Scotland
• Anti-dumping duties; see Dumping (pricing policy)
• Atatürkist Thought Association (Turkish: Atatürkçü Düşünce Derneği), a Turkish secularism organization
• Dzodinka language (ISO 639-3 code), a Niger-Congo language of Cameroon
• Agency for Defense Development, a South Korean government agency