amberjack /ˈæm.bɚ.d͡ʒæk/ noun1 •Any of several large food and game yellowtail fishes of the genus Seriola, found in warm waters of all oceans.It was an amberjack, and twice as large as any I had ever seen before. As I drew up the captain's snapper this amberjack came to the surface, and I certainly yelled. — 1925 formsamberjacks