'Allegheny' definitions:
Definition of 'Allegheny'
From: WordNet
noun
A river that rises in Pennsylvania and flows north into New York and then back south through Pennsylvania again to join the Monongahela River at Pittsburgh which is the beginning of the Ohio River [syn: Allegheny, Allegheny River]
Allegheny -- U.S. County in Pennsylvania
From: Gazetteer 2000
Name :
Allegheny -- U.S. County in Pennsylvania
Population (2000) :
1281666
Housing Units (2000) :
583646
Land area (2000) :
730.169813 sq. miles (1891.131054 sq. km)
Water area (2000) :
14.537638 sq. miles (37.652307 sq. km)
Total area (2000) :
744.707451 sq. miles (1928.783361 sq. km)
Located within :
Pennsylvania (PA), FIPS 42
Location :
40.440569 N, 79.959705 W