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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
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