SUMP Meaning of SUMP in English n. 1 a pit, well, hole, etc. in which superfluous liquid collects in mines, machines, etc. 2 a cesspool. [ ME, = marsh f. MDu., MLG sump, or (mining) G Sumpf, rel. to SWAMP ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012