cistern
What does "cistern" mean?
A cistern is a waterproof container or reservoir designed to catch and store rainwater, typically located underground or positioned on a roof. The mental image is of a cool, dark, hidden tank that serves as a vital backup water supply, often associated with older architecture or rural infrastructure. While the word is technically accurate for many modern water-holding tanks, it carries a slightly old-fashioned or utilitarian tone. In modern domestic contexts, people are more likely to refer to a "water tank," whereas "cistern" is frequently used specifically to describe the tank that holds water for a flush toilet.
"cistern" in conversation
Discussing home renovations
We found an old stone cistern under the patio during the dig.
We found an old stone cistern under the patio during the dig.
That’s incredible! Are you going to restore it for garden irrigation?
That’s incredible! Are you going to restore it for garden irrigation?
Used here in the sense of a historical water storage structure.
Plumbing trouble
The fill valve in the cistern is stuck, which is why the toilet won't stop running.
The fill valve in the cistern is stuck, which is why the toilet won't stop running.
Can you fix it, or does the whole tank need replacing?
Can you fix it, or does the whole tank need replacing?
Used here in the common domestic sense of a toilet tank.
"cistern" in a sentence
The house relies on a large rooftop cistern for its water supply.
The house relies on a large rooftop cistern for its water supply.
During the drought, the villagers maintained the underground cistern to preserve every drop of rain.
During the drought, the villagers maintained the underground cistern to preserve every drop of rain.
The antique plumbing featured a high-level cistern operated by a long, decorative pull-chain.
The antique plumbing featured a high-level cistern operated by a long, decorative pull-chain.
