/ Dictionary / Index A archenemy: Meaning and Definition of Find definitions for: arch•en•e•my Pronunciation: (ärch'en'u-mē), [key] — pl. -mies. a chief enemy. Satan; the Devil. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. archencephalon archenteron Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language