Definition of black water in English:
Waste water from toilets. Compare with gray water.
- After consumption, about 80 per cent of the water comes out as waste and this includes black water and grey water.
- The sludge disaster was the nation's worst-ever black water spill.
- You can use water - not your drinking water, but gray water, or water that has been used before but is not yet dirtied to the point of black water.
Definition of black water in:
- British & World English dictionary
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