Dictionary.com
definitions

Grand Turk

noun
  1. an island in the Turks and Caicos Islands of the West Indies. 7 miles (11 km) long.
  2. capital of the Turks and Caicos Islands, on Grand Turk.

Turks and Caicos Islands

[turks; kahy-kohs, key-]
plural noun
  1. two groups of islands in the SE Bahamas: British crown colonies. About 166 sq. mi. (430 sq. km). Capital: Grand Turk.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for grand turk

Turks and Caicos Islands

pl n
  1. a UK Overseas Territory in the Caribbean, southeast of the Bahamas: consists of the eight Turks Islands, separated by the Turks Island Passage from the Caicos group, which has six main islands. Capital: Grand Turk. Pop: 47 754 (2013 est). Area: 430 sq km (166 sq miles)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012