A region of eastern Africa, comprising Zanzibar Island and several adjacent islands off the northeast coast of Tanzania. Arab and Portuguese traders visited the region in early times, and it was controlled by Omanis in the 18th and 19th centuries. Britain established a protectorate (1890) that became an independent sultanate in December 1963 and a republic after an uprising in January 1964. In April 1964 it joined Tanganyika to form a new republic that was renamed Tanzania in October 1964.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.