/ Dictionary / Index A archfiend: Meaning and Definition of Find definitions for: arch•fiend Pronunciation: (ärch'fēnd'), [key] — n. a chief fiend. Satan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. archetype arch head Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language