sump

Definitions of sump
  1. noun
    a well or other hole in which water has collected
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    type of:
    well
    a deep hole or shaft dug or drilled to obtain water or oil or gas or brine
  2. noun
    a covered cistern; waste water and sewage flow into it
    synonyms: cesspit, cesspool, sink
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    type of:
    cistern
    an artificial reservoir for storing liquids; especially an underground tank for storing rainwater
  3. noun
    an oil reservoir in an internal combustion engine
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    type of:
    reservoir
    tank used for collecting and storing a liquid (as water or oil)
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