1. a city in W Pennsylvania. 33,621.
2. a city in E Indiana. 20,056.
Pronunciation: (nOO'kas"ul, -kä"sul, nyOO'-),[key] —n. 1. 1st Duke of. See Pelham-Holles, Thomas. 2. Also called New•cas•tle-up•on-TynePronunciation: (nOO'kas"ul-u-pon"tīn', -u-pôn"-, -kä"sul-, nyOO'-).[key]a seaport in Tyne and Wear, in NE England, on the Tyne River: shipbuilding; major coal center. 295,700.
3. a seaport in E New South Wales, in SE Australia. 146,900.
4. a town in SE Ontario, in S Canada, NE of Toronto, on Lake Ontario. 32,229.
5. carry coals to Newcastle, a. to take something to a place where its kind exists in great quantity.
b. to do something wholly unnecessary.