/ Dictionary / Index P pentarchy: Meaning and Definition of Find definitions for: pen•tar•chy Pronunciation: (pen'tär-kē), [key] — pl. -chies. a government by five persons. a governing body of five persons. a federation of five nations, each under its own government or ruler. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pentaptych pentastich Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language