Definitions for "Graywater"
Graywater is wastewater produced from baths, washers, and bathroom sinks. The wastewater generated by toilets, kitchen sinks, and dishwashers is called “blackwater.” Graywater can be used for irrigation purposes in some areas, although each county has different regulations.
Wastewater other than sewage, i.e. sink and bathwater drainage or washing machine discharge.
Water that has been used for showering, clothes washing, and faucet uses that can be reused for irrigation in some circumstances.