gray water

noun

Definition of gray water

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

First Known Use of gray water

1977, in the meaning defined above

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The first known use of gray water was in 1977

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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 Nov. 2020.

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