sludge
mud, mire, or ooze; slush.
a deposit of ooze at the bottom of a body of water.
any of various more or less mudlike deposits or mixtures.
the sediment in a steam boiler or water tank.
broken ice, as on the sea.
a mixture of some finely powdered substance and water.
sediment deposited during the treatment of sewage.
Also called activated sludge. Bacteriology. sewage sediment that contains a heavy growth of microorganisms, resulting from vigorous aeration.
a fine, mudlike powder produced by a mining drill.
Origin of sludge
1Other words from sludge
- de-sludge, verb (used with object), de-sludged, de-sludg·ing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use sludge in a sentence
With regard to the manurial value of the resulting sludges, much difference of opinion has existed.
Manures and the principles of manuring | Charles Morton Aikman
British Dictionary definitions for sludge
/ (slʌdʒ) /
soft mud, snow, etc
any deposit or sediment
a surface layer of ice that has a slushy appearance
(in sewage disposal) the solid constituents of sewage that precipitate during treatment and are removed for subsequent purification
Origin of sludge
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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