a state of the southwestern US: consists of the Colorado plateau in the northeast, including the Grand Canyon, divided from desert in the southwest by mountains rising over 3750 m (12 500 ft). Capital: Phoenix. Pop: 5 580 811 (2003 est). Area: 293 750 sq km (113 417 sq miles) Abbreviation Ariz., (with zip code) AZ
1861, originally the name of a breakaway Confederate region of southern New Mexico; organized roughly along modern lines as a U.S. territory in 1863. From Sp. Arizonac, probably from a local name among the O'odham (Piman) people meaning "having a little spring." Alternative theory is that it derives from Basque arizonak "good oaks."