Carnegie (kärnĕgˈē, kärˈnəgē) [key], borough (1990 pop. 9,278), Allegheny co., SW Pa., an industrial suburb of Pittsburgh; inc. 1894. A steel town, it has coal mines and plants that make chemicals and electrical equipment. The Neville House was the home of Gen. John Neville, an officer in the French and Indian Wars and the American Revolution. The borough was named for Andrew Carnegie.