CD-ROM (s??d??r?m?)n. A compact disc that functions as read-only memory.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.CD-ROM (-?r?m) n (Electronics) compact disc read-only memory; a compact disc used with a computer system as a read-only optical diskCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014CD-ROM (?si?di?r?m) n. a compact disc on which a large amount of digitized read-only data can be stored. Compare ROM. [1985?90; c(ompact) d(isc) r(ead-)o(nly) m(emory)] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.CD-ROM (s??d??r?m?) A compact disk containing permanently stored data that cannot be altered.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.