Acronym for Color/Graphics Adapter. A video adapter board introduced by IBM in 1981. The CGA is capable of several character and graphics modes, including character modes of 40 or 80 horizontal characters (columns) by 25 vertical lines with 16 colors, and graphics modes of 640 horizontal pixels by 200 vertical pixels with 2 colors, or 320 horizontal pixels by 200 vertical pixels with 4 colors. See also graphics adapter, video adapter.
(abbreviation for color graphics adapter) In computing, first color display system for IBM PCs and compatible machines. It has been superseded by EGA, VGA, SVGA, and XGA.