·noun ·see Slime, 4.
II. Sludge ·noun Mud; mire; soft mud; slush.
III. Sludge ·noun Small floating pieces of ice, or masses of saturated snow.
IV. Sludge ·add. ·noun Anything resembling mud or slush; as: (a) A muddy or slimy deposit from sweage. (b) Mud from a drill hole in boring. (c) Muddy sediment in a steam boiler. (d) Settling of cottonseed oil, used in making soap, ·etc. (e) A residuum of crude paraffin-oil distillation.