The word "sump" defines a low-lying pit, cavity, or reservoir engineered to collect and temporarily hold unwanted liquids such as groundwater, wastewater, or engine oil. In domestic architecture, it refers to the basin dug into a basement floor that houses a sump pump. In automotive mechanics, it describes the oil reservoir beneath an engine. Across all applications, the term implies a localized collection point where liquids pool by gravity before being pumped away or recirculated through a mechanical system.
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