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.
or New·cas·tle-un·der-Lyme (-ŭn'dər-līm') A municipal borough of west-central England southwest of Stoke. It has varied industries. Population: 74,400.
or Newcastle upon Tyne (tīn) A borough of northeast England on the Tyne River north of Leeds. Built on the site of a Roman military station, it became a coal-shipping port in the 13th century and was the principal center for coal exports after the 16th century. Its prominence in the trade gave rise to the expression to carry coals to Newcastle, meaning "to do something superfluous or unnecessary." Population: 189,000.