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slag heap

noun
  1. a hillock of waste matter from coal mining, etc
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for slag heap

Historical Examples of slag heap

  • To the south of Lens there is a slag-heap overgrown with weeds called the Green Crassier.

    From Bapaume to Passchendaele, 1917

    Philip Gibbs

  • Dakin, wandered into the slag-heap and took part in the battle, helping to kill some of the Boche there.