1. cistern - noun
· a sac or cavity containing fluid especially lymph or cerebrospinal fluid
Synonym(s): cisterna
Hypernym(s): sac
2. cistern - noun
· a tank that holds the water used to flush a toilet
Synonym(s): water_tank
Hypernym(s): tank, storage_tank
3. cistern - noun
· an artificial reservoir for storing liquids; especially an underground tank for storing rainwater
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