/ Dictionary / Index C CD single: Meaning and Definition of Find definitions for: CD single Pronunciation: [key] a compact disk, usually three inches in diameter, containing one or two popular songs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. CD-ROM CDT Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language