Sump

Noun

 * 1) A hollow or pit into which liquid drains, such as a cesspool, cesspit or sink.
 * 2) The lowest part of a mine shaft into which water drains.
 * 3) A completely flooded cave passage, sometimes passable by diving.
 * 4)  The crankcase or oil reservoir of an internal combustion engine.
 * 5)  The pit at the lowest point in a circulating or drainage system (FM 55-501).
 * 6)  An intentional depression around a drain or scupper that promotes drainage.
 * 7) (plumbing) A pit, tank or reservoir serving as a receiving drain for fluids to be further disposed of

Verb

 * 1)  Of a cave passage, to end in a sump, or to fill completely with water on occasion.
 * 2) * We discovered a new passage, but it sumped after 100 metres.
 * 3) * This low passage sumps quickly after moderate rainfall.

Thesaurus
artificial lake, baygall, bayou lake, bog, bottom, bottomland, bottoms, buffalo wallow, cesspool, cistern, cloaca, cloaca maxima, dam, dead water, dike, drain, dump, etang, everglade, farm pond, fen, fenland, fishpond, freshwater lake, garbage dump, glacial lake, glade, gutter, headchute, hog wallow, holm, inland sea, kennel, lagoon, laguna, lake, lakelet, landlocked water, linn, loch, lough, marais, marish, marsh, marshland, meadow, mere, millpond, millpool, mire, moor, moorland, morass, moss, mud, mud flat, nyanza, oxbow lake, peat bog, piscina, plash, pond, pondlet, pool, puddle, quag, quagmire, quicksand, reservoir, salina, salt marsh, salt pond, scupper, septic tank, sewer, sink, slob land, slough, sluice, sough, stagnant water, standing water, still water, swale, swamp, swampland, taiga, tank, tarn, tidal pond, volcanic lake, wallow, wash, water hole, water pocket, well

Derived terms

 * dry sump
 * sump pump
 * wet sump

Anagrams

 * umps

Noun

 * 1) swamp (type of wetland)