Definition of CD-ROM noun from the Oxford Advanced Learner's Dictionary

 

CD-ROM

 noun
noun
BrE BrE//ˌsiː diː ˈrɒm//
 
; NAmE NAmE//ˌsiː diː ˈrɑːm//
 
[countable, uncountable]
 
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the abbreviation for compact disc read-only memory (a CD on which large amounts of information, sound and pictures can be stored, for use on a computer) The software package contains 5 CD-ROMs. The encyclopedia is available on CD-ROM. a CD-ROM drive (= in a computer) This dictionary is also available on CD-ROM. This is the CD-ROM edition of the encyclopedia. compare ROM Word Origin 1980s: acronym from compact disc read-only memory.
See the Oxford Advanced American Dictionary entry: CD-ROM