Definition of dross noun from the Oxford Advanced American Dictionary

     

    dross

     noun
    noun
    NAmE//drɔs//
     
    , NAmE//drɑs//
     
    [uncountable]
     
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  1. 1 something of very low quality; the least valuable part of something mass-produced dross The dross churned out by some record companies isn't worth listening to. He considered the working class to be the dross of society.
  2. 2 (technology) a waste substance, especially that separated from a metal when it is melted The fire burns away the dross, leaving the pure metal.
See the Oxford Advanced Learner's Dictionary entry: dross