noun. ['ˈslʌdʒ'] the precipitate produced by sewage treatment.
1. Noun, singular or mass Wipe out the inside bottom of the axle housing to remove any remaining gear oil and sludge. 2. Verb, base form Areas with heavy silt, sandstone and limestone are especially predisposed to sludge buildup.
noun. ['ˈslʌdʒ'] any thick, viscous matter.
