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Definition of graywater

graywater

/ˈɡreɪˌwɔːtər/
(UK: greywater)
gray · wa · ter
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graywater Lexical Profile

graywater Game Scores & Validity

• noun

1

American Relatively clean domestic wastewater generated from household fixtures such as sinks, showers, bathtubs, and washing machines, which is free of toilet waste and can be treated and recycled for non-potable uses like irrigation or toilet flushing.

Example

"The eco-friendly home features a filtration system that diverts graywater from the laundry room to irrigate the backyard garden."

Synonyms
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Antonyms
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Word Nuance & Usage

Spelled "graywater" in American English and "greywater" in British and Commonwealth English, this term is strictly contrasted with "blackwater" (sewage containing human waste from toilets).

• Nearby Words

grayly
grayness
grayscale
graywater
graz
graze
grazer

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Graywater. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/graywater
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