n. abbreviation for Acura (type of car made by Honda)

Air Conditioning, must usually used while driving.

Anarcho-capitalism.

Also known as market anarchy or voluntarism/voluntaryism.

It's the idea that only voluntary cooperation (trade, the market) are legitimate forms of human interaction.

An anarcho-capitalist therefore envisions arbitration, security and defense to be solved through competing market agents instead of forceful territorial monopolists (as all statists including minarchists defend).

Alternating Current

This type of electrical current is called alternating because it switches direction. Direct current (DC) is often seen as the opposite of AC since DC only flows in one direction. Alternating current is used in most applications including the electricity that comes out of the outlet in your wall.

Abbreviated form of Atlantic City. Used by suburban kids to sound like they're urban kids when talking about Atlantic City, New Jersey.

Atlantic City is a resort on the Southern New Jersey shore famous for its boardwalk, its casinos, its beaches, and also for White House Subs.

A 1991-1995 Acura Legend. Usually still in use by pimps and thugs do to its spacious interior, pimped out sound system, and general bling blingness.

Abbreviation for 'Armor Class'. In the latest edition of DnD, AC is a number which signifies the difficulty of hitting a target in combat; the higher the number, the harder it is.

Allied Chat. Used in some online multiplayer games to instruct team-mates to turn on allied chat or to signify that you have turned on allied chat.