an inland county of S central England: situated mostly in the basin of the Upper Thames, with the Cotswolds in the west and the Chilterns in the southeast. Administrative centre: Oxford. Pop: 615 200 (2003 est). Area: 2608 sq km (1007 sq miles)
Abbreviation: Oxon
Oxfordshire in American English
(ˈɑksfərdˌʃɪr; ˈɑksfərdʃər)
county in SC England: 997 sq mi (2,582 sq km); pop. 548,000