/ Dictionary / Index A Armagh: Meaning and Definition of Find definitions for: Ar•magh Pronunciation: (är-mä'), [key] — n. a county in S Northern Ireland. 133,969; 489 sq. mi. (1267 sq. km). Co. seat: Armagh. an administrative district in this county. 46,850; 261 sq. mi. (676 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Armageddon Armagnac Related Content Daily Word Quiz: alacrity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language