sump.
A hollow or pit into which liquid drains, such as a cesspool, cesspit or sink.
Meaning & usage
A hollow or pit into which liquid drains, such as a cesspool, cesspit or sink.
The lowest part of a mineshaft into which water drains.
A completely flooded cave passage, sometimes passable by diving.
The crankcase or oil reservoir of an internal combustion engine.
The pit at the lowest point in a circulating or drainage system (FM 55-501).
An intentional depression around a drain or scupper that promotes drainage.
A sudden or heavy fall of rain; a deluge.
Where this word comes from
From Middle English sompe, either from Middle Dutch somp, sump or Middle Low German sump from Old Saxon *sump, from Proto-West Germanic *sump, ultimately from Proto-Germanic *sumpaz. Doublet of swamp.
Of a cave passage, to end in a sump, or to fill completely with water on occasion.
We discovered a new passage, but it sumped after 100 metres.
This low passage sumps quickly after moderate rainfall.
Where this word comes from
From Middle English sompe, either from Middle Dutch somp, sump or Middle Low German sump from Old Saxon *sump, from Proto-West Germanic *sump, ultimately from Proto-Germanic *sumpaz. Doublet of swamp.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.