Allegheny

American  

[al-i-gay-nee] / ˌæl ɪˈgeɪ ni /

noun

1. a river flowing NW from Pennsylvania into SW New York and then S through W Pennsylvania, joining the Monongahela at Pittsburgh to form the Ohio River. 325 miles (525 km) long.

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Other Word Forms

• Alleghanian
  adjective
• Alleghenian
  adjective
• trans-Alleghenian
  adjective

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Example Sentences

See Examples For:

Allegheny

The Pirates have been a perpetual laughingstock ever since Barry Bonds ditched the Allegheny for the San Francisco Bay after leading Pittsburgh to the National League Championship Series in 1992.

From The Wall Street Journal ● Apr. 9, 2026

In Pennsylvania, Democrat Jen Mazzocco won her race in Allegheny County by 64 points — doubling the margin her predecessor had posted in 2024.

From Salon ● Feb. 25, 2026

“We built it for USAir,” Allegheny County executive Rich Fitzgerald said many years later, “hoping that they would grow jobs here, putting their hub and their headquarters here.”

From Slate ● Nov. 24, 2025

Where I’m from, everybody who is Black in our city has a reference point to the Allegheny County Jail, which is in the middle of Pittsburgh.

From Los Angeles Times ● Apr. 17, 2025

In late July 1919, miners walked out at Allegheny Coal & Coke in Brackenridge, Pennsylvania, demanding the company recognize the union.

From "Fannie Never Flinched" by Mary Cronk Farrell

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