American English

Definition of sludge noun from the Oxford Advanced American Dictionary

     

    sludge

     noun
    noun
    NAmE//slʌdʒ//
     
    [uncountable]
     
    jump to other results
  1. 1thick, soft, wet mud or a substance that looks like it synonym slime There was some sludge at the bottom of the tank.
  2. 2industrial or human waste that has been treated industrial sludge the use of sewage sludge as a fertilizer on farms
See the Oxford Advanced Learner's Dictionary entry: sludge