1. a pit or reservoir serving as a drain or receptacle for liquids
2. the lowest part of a mine shaft where water collects
Usage: mining
3. the oil pan or crankcase of an engine
Usage: automotive

Examples

• The basement sump pump removes water during heavy rains.
• Water accumulated in the mine sump after the flooding.
• The mechanic drained oil from the engine sump.
• A backup sump system prevents basement flooding.
• The sump was cleaned to remove debris and sediment.
• Oil leaked from a crack in the sump pan.