Definition of sump noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//sʌmp//
    ; NAmE NAmE//sʌmp//
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  1. 1a hole or hollow area in which liquid waste collects
  2. 2(North American English also oil pan) the place under an engine that holds the engine oil
  3. Word OriginMiddle English (in the sense ‘marsh’): from Middle Dutch or Low German sump, or (in the mining sense) from German Sumpf; related to swamp.
See the Oxford Advanced American Dictionary entry: sump