a county of E England, in East Anglia: includes the former counties of the Isle of Ely and Huntingdon and lies largely in the Fens: Peterborough became an independent unitary authority in 1998. Administrative centre: Cambridge. Pop (excluding Peterborough): 571 000 (2003 est). Area (excluding Peterborough): 3068 sq km (184sq miles)
Cambridgeshire in American English
(ˈkeɪmbrɪdʒˌʃɪr)
county in EC England: 1,313 sq mi (3,401 sq km); pop. 645,000