/ Dictionary / Index Y yellow jack: Meaning and Definition of Find definitions for: yel'low jack" Pronunciation: [key] — pl. jack, jacks See See any carangoid fish, esp. a Caribbean food fish, Caranx bartholomaei. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. yellowish yellow jacket Related Content Daily Word Quiz: sublime Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language