/ Dictionary / Index S seajack: Meaning and Definition of Find definitions for: sea•jack Pronunciation: (sē'jak"), [key] — n. the hijacking of a ship, esp. one that occurs while the vessel is under way. —v.t. to hijack (a ship) while at sea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sea Islands sea kale Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language