What does the word slag mean?

Usage examples for slag

  1. The great mass of potsherds, lumps of glass, heaps of slag, etc. – The Negro by W.E.B. Du Bois
  2. Next moment we have deployed into extended order, and step out, to play our little part in the great Battle of the Slag- Heaps. – The First Hundred Thousand by Ian Hay
  3. He paints for them the world as it will be when his dominion over it is complete, when the soft airs and green mosses of its valleys shall be changed into smoke, slag, and filth; when slavery, disease, and squalor, soothed by drunkenness and mastered by the policeman's baton, shall become the foundation of society; and when nothing shall escape ruin except such pretty places and pretty women as he may like to buy for the slaking of his own lusts. – The Perfect Wagnerite A Commentary on the Niblung's Ring by George Bernard Shaw