/ Dictionary / Index E ethnarch: Meaning and Definition of Find definitions for: eth•narch Pronunciation: (eth'närk), [key] — n. the ruler of a people, tribe, or nation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ethnarch (Thesaurus) ethmoid ethnarchy Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language