cistern

mastery
UK /ˈsɪs.tən/ US /ˈsɪs.tɚn/noun

card 1 of 9 · context meaning

Which meaning of 'cistern' is used in the sentence?

It is possible to connect your tank to your toilet cistern and/or garden, so that even if the water is not drinkable it still can be used productively to make major water savings.