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.

Related formsAl·le·ghe·ni·an, Al·le·gha·ni·an, adjectivetrans-Al·le·ghe·ni·an, adjective

Allegheny Mountains

plural noun

a mountain range in Pennsylvania, Maryland, West Virginia, and Virginia: a part of the Appalachian Mountains.
Also called Al·le·ghe·nies. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Allegheny Mountains


pl n

a mountain range in Pennsylvania, Maryland, Virginia, and West Virginia: part of the Appalachian system; rising from 600 m (2000 ft) to over 1440 m (4800 ft)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

allegheny in Culture

Allegheny Mountains


Western part of the Appalachian Mountains, extending from northern Pennsylvania southwest to southwestern Virginia.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.