sink2

noun

• 1a fixed basin with a water supply and outflow pipe: I stood at the kitchen sink [as modifier]:a sink unit with cupboard and drawers under

• 2a pool or marsh in which a river’s water disappears by evaporation or percolation.
• technical a body or process which acts to absorb or remove energy or a particular component from a system:a heat sink the oceans can act as a sink for CO₂The opposite of source.

• 3short for sinkhole.

• 4 [usually as modifier] British a school or estate situated in a socially deprived area:the local sink school a sink estate