Historical territory (1834-90) of the S U.S., reserved for Amerindian peoples: now a part of Oklahoma
See Indian Territory in American Heritage Dictionary 4
A region and former territory of the south-central United States, mainly in present-day Oklahoma. It was set aside by the government as a homeland for forcibly displaced Native Americans in 1834. The western section was opened to general settlement in 1889 and became part of the Oklahoma Territory in 1890. The two territories were merged in 1907 to form the state of Oklahoma.