Allegheny

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Definition

Proper noun: * A major river in the northeastern United States: The Allegheny is a significant river forming part of the Ohio River system. It originates in Pennsylvania, flows northward into New York, then turns southward back through Pennsylvania, where it converges with the Monongahela River at Pittsburgh to form the Ohio River.

Examples of Usage
  • Proper noun:
    • The Allegheny River is a vital waterway for transportation and industry.
    • We went canoeing on the Allegheny last summer.
    • Pittsburgh is situated at the confluence of the Allegheny and Monongahela rivers.
Advanced Usage
  • "Allegheny" as a geographical/cultural region: The name is often used to refer to the plateau, mountain range (Allegheny Mountains), or general region through which the river flows.
    • The forests of the Allegheny region are known for their biodiversity.
Variants and Related Words
  • Allegheny Mountains (proper noun): A major mountain range forming part of the Appalachian Mountains, extending through Pennsylvania, Maryland, West Virginia, and Virginia.
  • Allegheny Plateau (proper noun): A large dissected plateau region located in the eastern United States, encompassing parts of New York, Pennsylvania, Ohio, and West Virginia.
Synonyms
  • Allegheny River (full formal name).
Noun
  1. 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