NOUN
- the western part of the Appalachian Mountains; extending from northern Pennsylvania to southwestern Virginia
How To Use Allegheny Mountains In A Sentence
- Brigadier General Edward Johnson held the crest of the Allegheny Mountains with a small contingent and had beaten off one attack with so much success that he had received the nom de guerre "Allegheny" Johnson. LEE’S LIEUTENANTS
- The location could not have been better: within easy reach of Washington, yet protected by the Allegheny mountains and with prevailing winds from Canada to disperse any radiation.