CVAR

CVAR is an abbreviation for Console Variable.

This is a type of variable used in many computer games and computer 3d simulation engines that can be manipulated by a text based command line interface within the game or engine, often called a console. They commonly hold configuration parameters, but can be used for anything that may potentially be accessed and/or modified by the console.

The most common usage of CVARs is probably by server operators to customise their online game servers.