amberjackPronunciation: /ˈambədʒak/Definition of amberjack noun a large marine game fish which occurs in inshore tropical and subtropical waters of the Atlantic and South Pacific. Genus Seriola, family Carangidae: several species Origin: late 19th century: from amber (because of its yellowish tail) + jack1amberjack in other Oxford dictionaries Definition of amberjack in the US English dictionary