Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “grey water”

grey water

noun [U] uk (US usually gray water)   us  
water that has been used before, for example for washing, that can be stored and used again, for example in toilets: Water companies are testing recycling units which take grey water and clean it up sufficiently for flushing toilets.Environmental issuesRubbish and wasteProtection and protectorsWater in general
(Definition of grey water from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of grey water?
Add Cambridge dictionaries to your browser to your website

Definitions of “grey water” in other dictionaries

Translations of “grey water”

Word of the Day

bitter

a type of dark brown beer with a bitter taste

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More