/ Dictionary / Index C CDC: Meaning and Definition of Find definitions for: CDC Pronunciation: [key] Centers for Disease Control. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cdc (Thesaurus) CD CD4 Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language