a state in the S central U.S. 69,919 sq. mi. (181,090 sq. km). . Capital: Oklahoma City. Abbreviation: OK (for use with zip code), Okla.
a state in the S central US: consists of plains in the west, rising to mountains in the southwest and east; important for oil. Capital: Oklahoma City. Pop: 3 511 532 (2003 est). Area: 181 185 sq km (69 956 sq miles) Abbreviation Okla., (with zip code) OK