/ Dictionary / Index W will-o'-the-wisp: Meaning and Definition of Find definitions for: will-o'-the-wisp Pronunciation: (wil'u-u-wisp'), [key] — n. See(def. 1). anything that deludes or misleads by luring on. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: will-o'-the-wisp (Thesaurus) Willmar City Willoughby Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language