Allegheny

American  

[al-i-gey-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

Example Sentences

See Examples For:

Allegheny

“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

North Hills Community Outreach, which runs three food pantries in Pennsylvania’s Allegheny County, saw an almost 50% increase in the number of people lining up for food last week.

From The Wall Street Journal ● Nov. 11, 2025

Allegheny County officials told the BBC that the group had come to apply for mail-in ballots and the officials reiterated that only US citizens can register to vote.

From BBC ● Oct. 30, 2024

Lori Sarver, 54, has lived in Cranberry Township in southwestern Butler County for 40 years but used to live in Allegheny County.

From Los Angeles Times ● Jul. 17, 2024

Ophie and her mother had gone to see one of the Allegheny River’s many dams after they’d arrived, a trip to sightsee a bit in their new home.

From "Ophie's Ghosts" by Justina Ireland