/ Dictionary / Index D diarchy: Meaning and Definition of Find definitions for: di•ar•chy Pronunciation: (dī'är-kē), [key] — pl. -chies. government in which power is vested in two rulers or authorities. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diarchy (Thesaurus) Diarbekr diarist Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language