/ Dictionary / Index W whitecap: Meaning and Definition of Find definitions for: white•cap Pronunciation: (hwīt'kap", wīt'-), [key] — n. a wave with a broken and foaming white crest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: whitecap (Thesaurus) white campion white cast iron 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