a group of islands in the S Pacific Ocean, forming a county of South Island, New Zealand: consists of the main islands of Chatham, Pitt, and several rocky islets. Chief settlement: Waitangi. Pop: 609 (2006 est). Area: 963 sq km (372 sq miles)
Chatham Islands in American English
group of islands of New Zealand, c. 500 mi (805 km) east of North Island: 372 sq mi (963 sq km)