/ Dictionary / Index W white hat: Meaning and Definition of Find definitions for: white' hat' Pronunciation: [key] — Informal. Informal. a virtuous hero, esp. in a cowboy movie; good guy. Cf.(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. white-handed gibbon whitehead Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language