/ Dictionary / Index H Heraclitus: Meaning and Definition of Find definitions for: Her•a•cli•tus Pronunciation: (her"u-klī'tus), [key] — n. (“the Obscure”) c540–c470 b.c., Greek philosopher. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heraclitus (Thesaurus) Heracliteanism Heraclius 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