Definitions

1. noun

A thick, heavy, and usually liquid substance consisting of mud, water, and small particles of other matter, often resulting from industrial or sewage waste.

“The town struggled to clean up the sludge that had polluted the local river.”

2. verb

To make or become covered in or as if in a thick, heavy liquid substance, especially one resulting from industrial or sewage waste.

“The city’s water supply was sludged with pollutants from the nearby factory.”