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Anno Domaini, Latin/American for 'the domain name decades' with A.D. marking the years after the 'birth' of the domain names (1985).

Anno Domaini Inc. is a internet company based in Delray Beach, Florida. It's main focus is selling various brandable, descriptive and significant domain names. Anno Domaini Inc. A Dollar, A Dream and ... A Domain name.
Domain names are formed by the rules and regulations (certain procedures to follow) of the Domain Name System (DNS). Any name registered in this DNS, A.D. 1985 is A Domain name.
A.D. by Dutchie66 August 20, 2013
Related Words
A.D.A.M. • a.d. • a.d.s. • A.D.O • A.D.I.D.A.S. • A.D.S.R.S • A+D • A.d: 2688 • A.D.I.D • a&d
Code word for adrenaline needle, used as a last resort for someone who thinks they are about to die from a heroin overdose. Something about adrenaline counteracts the heroin, sometimes saving the user.
"Shit, I need the A.D."
a.d. by prongstape July 28, 2008
Alpha Dog. The shortened name of rapper Alpha Dog from the rap group the G.D.I.'s. OR the leader/protector of the pack, usually the biggest and meanest memeber of a group of people, quite often an asshole.
A.D.'s gonna beat the hell out of you when he finds out you sucker punched his boy last night
A.D. by Joey_Bag_Of_Donuts August 13, 2010
a.d. means anonymous dick. It is usually in the context of a random hookup, especially involving oral sex on a guy. It mostly refers to gay guys or guys who have sex with men.
I really could blow some A.D. right now!
a.d. by Mister7 December 5, 2009
A.d apartment dwellers a person who thinks he so cool but is living in his moms apartment
A.d by Honey_your_gay December 5, 2019
A.D means Ass Disease like when a female has a big round ass.
damn those senoritas have a case of A.D
A.D by AHDIU December 22, 2007
More from Urban Dictionary
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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