black water

American  

noun

1. wastewater from toilets, garbage disposal, and industrial processes.

---

black water British  

noun

1. household waste water that cannot be reused without purification Compare grey water

---

Example Sentences

Moonlight glinted off the black water, making it look like liquid silver.

From Literature

At one edge of the lake an arc of lights twinkled at a fair distance over the black water—a village, maybe a town.

From Literature

Across the black water, the dark mountainside was orange with fire.

From Literature

A 2023 report showed that 8,657 outdoor toileting incidents were recorded across the Highlands that year, including 126 times where "black water" toilet waste from campervans had been dumped.

From BBC

The boat’s searchlight swept across the empty black water.

From Literature