Grand Banks
or Grand Bank
noun
an extensive shoal SE of Newfoundland: fishing grounds. 350 miles (565 km) long; 40,000 sq. mi. (104,000 sq. km).
British Dictionary definitions for grand banks
Grand Banks
pl n
a part of the continental shelf in the Atlantic, extending for about 560 km (350 miles) off the SE coast of Newfoundland: meeting place of the cold Labrador Current and the warm Gulf Stream, producing frequent fogs and formerly rich fishing grounds