Look up AD, ad-, ad in Wiktionary, the free dictionary.

AD and Ad may refer to:

• Anno Domini, Latin for "In the Year of (Our) Lord", applied to years in the proleptic Gregorian calendar following 1 BC.
• Advertisement, the promotion of an item, service, company, and/or idea

Media and culture

• A.D.: New Orleans After the Deluge, a serialized webcomic on SMITH Magazine
• Ad, columnist in the English newspaper, The Saturday Sport (see also International Fanny Magnet)
• AD (band), a Christian rock band from 1984-1988
• AD (finnish band), Acción Directa, a Finnish industrial band.
• AD Music, record label
• Algemeen Dagblad, a Dutch newspaper
• American Dad!, a Fox Network animated program
• Anno Domini (gallery), a contemporary art gallery in San Jose, California
• Arrested Development, an emmy award winning Fox Network TV program
• Art director, the administrator in charge of art and design for a magazine or newspaper
• Assistant director, a film crew member who manages various tasks
• "at", "to", or "for", in some Latin phrases (such as ad lib or ad nauseam)
• Athletic director, the administrator of the athletics program, usually at an educational institution
• Academic Decathlon, a United States high school based academic competition

Politics and history

• Andorra, a small country in the Pyrenees
  • .ad, Andorra's ccTLD (Internet Country Code Top Level Domain)
  • Andorra's ISO 3166-1 country code
• Action Directe (terrorist group), a French left-wing terrorist group
• Democratic Action (Spanish: Acción Democrática), a Venezuelan social democratic party
• Democratic Alternative (Malta) (Maltese: Alternattiva Demokratika), the Maltese Green party
• Aad (Omani tribe), a destroyed civilization mentioned in the Quran
• Anno Diocletiani, the Era of (Emperor) Diocletian, an alternate year-numbering start date

Military

• Air defence, anti-aircraft weaponry and systems
• Accidental discharge, the mistaken firing of a firearm
• Active duty, a status of full duty or service, usually referencing full service in the armed forces
• Destroyer Tender (US Navy Hull Classification: AD), support ships to aid the operation of a fleet of destroyers
• The Air Department, part of the British Admiralty

Science and technology

• Adenovirus, viruses of the family Adenoviridae.
• Alzheimer's disease, a disease leading to the degeneration of neural function and dementia, usually seen in older people
• Active Directory, a component of Microsoft Windows that provides distributed user management and authentication
• Aggregate demand, the total demand curve of an entire economy that is the sum of each individual's demand
• Automatic differentiation, a way to speedily compute derivatives in computer programming
• Axiom of determinacy, a set theory axiom inconsistent with the Axiom of Choice
• Autodynamics, an alternate to special relativity proposed by Ricardo Carezani in physics
• Audio description, a narration track for blind and visually impaired viewers of media such as TV and film
• Administrative domain, a collection of hosts and routers into one network
• Analog Devices, a multinational producer of semiconductor devices.
• Analog-to-digital converter (A/D), a circuit which converts continuous analog signals to discrete digital values
• Active Disassembly, a technology involving specially designed building materials and components which are sturdy yet can easily be decomposed
• Atypical depression, a depression that still allows one to feel positive moods.
• Adamantyl (Ad), an abbreviation in organic chemistry for Adamantyl
• Sharpless asymmetric dihydroxylation, an abbreviation in organic chemistry for Sharpless asymmetric dihydroxylation

Transportation

• Airworthiness Directive, requirements on legal usage of airplanes given by the FAA
• Air Paradise (IATA code: AD), a defunct Indonesian airline

People

• Ad Tak, Dutch cyclist
• Adalius Thomas, football player
• Antonio Davis, basketball player
• Antonio Daniels, basketball player
• Adrian Peterson, football player, for "All Day"

Other

• Associate's Degree, an academic degree

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