/ Dictionary / Index A Allegheny Mountains: Meaning and Definition of Find definitions for: Al'leghe'ny Moun'tains Pronunciation: [key] a mountain range in Pennsylvania, Maryland, West Virginia, and Virginia: a part of the Appalachian Mountains. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Allegheny barberry Allegheny spurge Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language