"sump oil" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1960 December, “New G.E. Line diesel loco maintenance depot at Stratford”, in Trains Illustrated, page 767:",
          "text": "Dirty sump oil is pumped out along a waste oil pipe line to storage tanks by the boiler house, to be used as boiler fuel.",
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      ],
      "glosses": [
        "Lubricating oil contained in the sump of an engine; the waste oil drained from the sump at the time of an oil change."
      ],
      "id": "en-sump_oil-en-noun-2-Wm-6Sv",
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          "engine",
          "engine"
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          "oil change",
          "oil change"
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  "word": "sump oil"
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  "lang_code": "en",
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        {
          "ref": "1960 December, “New G.E. Line diesel loco maintenance depot at Stratford”, in Trains Illustrated, page 767:",
          "text": "Dirty sump oil is pumped out along a waste oil pipe line to storage tanks by the boiler house, to be used as boiler fuel.",
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      ],
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        "Lubricating oil contained in the sump of an engine; the waste oil drained from the sump at the time of an oil change."
      ],
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          "engine",
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          "waste"
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          "oil change"
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  "word": "sump oil"
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