An industrial city in south-western Pennsylvania, where the Allegheny and Monongahela Rivers join to form the Ohio River; population 310,037 (est. 2008).
Definition of Pittsburgh in US English:
Pittsburgh
proper nounˈpitsbərɡ
An industrial city in southwestern Pennsylvania, where the Allegheny and Monongahela Rivers join to form the Ohio River; population 310,037 (est. 2008).