plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe | an artificial reservoir for storing liquids; especially an underground tank for storing rainwater |
a covered cistern; waste water and sewage flow into it | a tank that holds the water used to flush a toilet |
a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof | a sac or cavity containing fluid especially lymph or cerebrospinal fluid |
(technology) a process that acts to absorb or remove energy or a substance from a system | |