/ Dictionary / Index D devilish: Meaning and Definition of Find definitions for: dev•il•ish Pronunciation: (dev'u-lish, dev'lish), [key] — adj. of, like, or befitting a devil; diabolical; fiendish. extreme; very great: a devilish mess. —adv. excessively; extremely: He's devilish proud. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: devilish (Thesaurus) devilfish devilkin Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language