Meaning of sludge


Pronunciation: (sluj), [key]
— n.
  1. mud, mire, or ooze; slush.
  2. a deposit of ooze at the bottom of a body of water.
  3. any of various more or less mudlike deposits or mixtures.
  4. the sediment in a steam boiler or water tank.
  5. broken ice, as on the sea.
  6. a mixture of some finely powdered substance and water.
  7. sediment deposited during the treatment of sewage.
  8. Also calledsewage sediment that contains a heavy growth of microorganisms, resulting from vigorous aeration.
  9. a fine, mudlike powder produced by a mining drill.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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