CD-ROM
WordNet
noun
(1) A compact disk that is used with a computer (rather than with an audio system); a large amount of digital information can be stored and accessed but it cannot be altered by the user
WiktionaryText
CD-ROM or CD ROM
- part Compact Disk - Read Only Memory. A device that can read CDs (Compact Disks), but can not write to them. Additionally, this is also a class of Compact Disks that are manufactured with the data and shipped, but cannot be written to at all.