The sludge in the pond is caused by fertilizer runoff.
- An example of sludge is a mass of mud formed in a river bed after a flood.
- An example of sludge is the treated material from a sewage plant.
Sludge is a substance that is between solid and liquid form.
- mud, mire, or ooze covering the ground or forming a deposit at the bottom of bodies of water
- spongy lumps of drift ice
- any heavy, slimy deposit, sediment, or mass, as the waste resulting from oil refining, the mud brought up by a mining drill, the precipitate in a sewage tank, the sediment in a steam boiler or crankcase, etc.
Origin of sludgevariant, variety of slutch, sludge, mud: akin to Middle English sluchched, muddy, probably ultimately from Indo-European base an unverified form (s)leu-, to hang limply from source sleet, Middle High German slote, mud, ooze
- Semisolid material such as the type precipitated by sewage treatment.
- Mud, mire, or ooze covering the ground or forming a deposit, as on a riverbed.
- Finely broken or half-formed ice on a body of water, especially the sea.
- A semisolid mass composed of an aggregation of cells (such as red blood cells in blood vessels) or particulate matter (such as cholesterol crystals and calcium salts in bile).
intransitive verbsludged, sludg·ing, sludg·es
To form sludge.
Origin of sludgePerhaps alteration of dialectal slutch mire