/ Dictionary / Index C Charles III: Meaning and Definition of Find definitions for: Charles III Pronunciation: [key] See(def. 2). (“Charles the Simple”) a.d. 879–929, king of France 898–923. See(def. 2). 1716–1788, king of Spain 1759–88; as Charles IV, king of Naples 1734–59. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Charles II Charles IV Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language