1) Consumer electronic 2) Japanese invention 
Compact disc (CD) is a digital optical disc data storage format. The format was originally developed to store and play only sound recordings (CD-DA), but was later adapted for storage of data (CD-ROM). Several other formats were further derived from these, including write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact ...
a molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information. Since its ... [15 related articles]
a small plastic disk that uses laser light to read digital information stored there
An optical disc designed to store digitally 74 minutes of stereo audio data. See also: Digital Versatile Disc.
Disk for storing digital information, about 12 cm/4.5 in across, mainly used for music, when it can have over an hour's playing time. A laser beam etches the compact disc with microscopic pits that carry a digital code representing the sounds; the pitted surface is then coated with aluminium. During playback, a laser beam reads the code...
a brand of compact disk.