/ Dictionary / Index W willful: Meaning and Definition of Find definitions for: will•ful Pronunciation: (wil'ful), [key] — adj. deliberate, voluntary, or intentional: The coroner ruled the death willful murder. unreasonably stubborn or headstrong; self-willed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: willful (Thesaurus) willey William Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language