Also called New⋅cas⋅tle-up⋅on-Tyne /ˈnuˌkæsələˌpɒnˈtaɪn,-əˌpɔn-,-ˌkɑsəl-,ˈnyu-/Show Spelled Pronunciation[noo-kas-uhl-uh-pon-tahyn,-uh-pawn-,-kah-suhl-,nyoo-]Show IPA.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.
—Idiom
5.
carry coals to Newcastle,
a.
to take something to a place where its kind exists in great quantity.