Noun: Allegheny ,a-lu'gey-nee
- 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
- Allegheny River
Derived forms: Alleghenies
Type of: river
Part of: Empire State, Keystone State, N.Y., New York, New York State, NY, PA, Pa., Pennsylvania
Encyclopedia: Allegheny, Pittsburgh