Oklahoma

Short definition from Wiktionary

Proper noun

1. 1
   A state in the central United States, formerly a territory. Capital: Oklahoma City.
2. 2
   A former territory (1890–1907) of the United States, encompassing the western half of the modern state.
3. 3
   Two communities in the United States, named for the state or territory: A borough of Westmoreland County, Pennsylvania.
4. 4
   Two communities in the United States, named for the state or territory: An unincorporated community in Carroll County, Mississippi.