SUMP

noun see: swamp Date: 1653 a pit or reservoir serving as a drain or receptacle for liquids: as, cesspool , a pit at the lowest point in a circulating or drainage system (as the oil-circulating system of an internal combustion engine), oil pan , crankcase , see: swamp the lowest part of a mine shaft into which water drains, an excavation ahead of regular work in driving a mine tunnel or sinking a mine shaft, something resembling a ~ ; sink 2