pittsburgh has definitions from the fields of government,geography
[ noun ] (government,geography) a city in southwestern Pennsylvania where the confluence of the Allegheny River and Monongahela River forms the Ohio River; long an important urban industrial area; site of Carnegie-Mellon University and the University of Pittsburgh

Used in print

(Robert A. Futterman, The Future of Our Cities....)

The big factories which are relatively near the centers of our cities - the rubber factories in Akron , Chrysler 's Detroit plants , U._S._Steel 's Pittsburgh works - often began on these sites at_a_time when that was the edge of the city , yet close to transport ( river ) , storage ( piers ) and power ( river ) .