Also spelled waterbutt
noun
Meanings
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1
noun
British: a large outdoor barrel or other container used to collect and store rainwater
They connected the roof gutter to a water butt and used the stored rain on the garden.
Thesaurus
Etymology
A compound of water and butt. Butt in this sense means a large cask for wine, beer, or water; it came through Anglo-French but or bout and Old Occitan bota from Late Latin buttis, 'cask.' Water butt is the usual British term, while rain barrel is common in North American English.