/ Dictionary / Index N New Castle: Meaning and Definition of Find definitions for: New' Cas"tle Pronunciation: [key] a city in W Pennsylvania. 33,621. a city in E Indiana. 20,056. New•cas•tle Pronunciation: (n'kas"ul, -kä"sul, ny'-), [key] — n. See Also calleda seaport in Tyne and Wear, in NE England, on the Tyne River: shipbuilding; major coal center. 295,700. a seaport in E New South Wales, in SE Australia. 146,900. a town in SE Ontario, in S Canada, NE of Toronto, on Lake Ontario. 32,229. to take something to a place where its kind exists in great quantity. to do something wholly unnecessary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: newcastle (Thesaurus) New Castile Newcastle disease Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language