- The definition of a cistern is a tank for storing water, or is an underground reservoir for rainwater.
The toilet tank that holds the water used to flush the toilet is an example of a cistern.
A toilet tank is an example of a cistern.
- a large receptacle for storing water; esp., a tank, usually underground, in which rain water is collected for use
- Anat. a sac or cavity containing a natural body fluid
Origin of cisternMiddle English cisterne from source Old French ; from Classical Latin cisterna, reservoir for water ; from cista, chest
- A receptacle for holding water or other liquid, especially a tank for catching and storing rainwater.
- Anatomy A cisterna.
Origin of cisternMiddle English cisterne, from Latin cisterna, from cista, box, from Greek kistē, basket.