gray water

noun

: household wastewater (as from a sink or bath) that does not contain serious contaminants (as from toilets or diapers)

Word History

First Known Use

1977, in the meaning defined above

Time Traveler
The first known use of gray water was in 1977

Rhymes for gray water

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Browse Nearby Words

grayware
gray water
gray wedge
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Cite this Entry

“Gray water.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gray%20water. Accessed 26 Oct. 2025.

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