/ Dictionary / Index C Cleon: Meaning and Definition of Find definitions for: Cle•on Pronunciation: (klē'on), [key] — n. died 422 b.c., Athenian general and political opponent of Pericles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cleomenes III Cleopatra Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language