- a pit, tank, etc. for collecting liquid, specif. one into which waste or excess liquid drains and from which it is evacuated mechanically
- Brit. oil pan
- a pit or pool at the bottom of a shaft or mine, in which water collects and from which it is pumped
- an excavation at the head of a tunnel or shaft
Origin of sumpMiddle English sompe, swamp
- a. A low-lying place, such as a pit, that receives drainage.b. A cesspool.
- A hole at the lowest point of a mine shaft into which water is drained in order to be pumped out.
- The crankcase or oil reservoir of an internal-combustion engine.
Origin of sumpMiddle English sompe, marsh, from Middle Low German sump or from Middle Dutch somp. Sense 2, from German Sumpf, swamp, sump, from Middle High German, swamp.
- A hollow or pit into which liquid drains, such as a cesspool, cesspit or sink.
- The lowest part of a mine shaft into which water drains.
- A completely flooded cave passage, sometimes passable by diving.
- (automotive) The crankcase or oil reservoir of an internal combustion engine.
- (nautical) The pit at the lowest point in a circulating or drainage system (FM 55-501).
- (construction) An intentional depression around a drain or scupper that promotes drainage.
(third-person singular simple present sumps, present participle sumping, simple past and past participle sumped)
- Of a cave passage, to end in a sump, or to fill completely with water on occasion.