sump

A low-lying place, such as a pit, that receives drainage.

A cesspool.

A hole at the lowest point of a mine shaft into which water is drained in order to be pumped out.

The crankcase or oil reservoir of an internal-combustion engine.

A puddle or pool of dirty water.

A pond of water reserved for salt-works.

In mining: The bottom of a shaft in which water is allowed to collect, in order that it may be pumped or otherwise raised to the surface or to the level of the adit. Also called in England, in some mining districts, a lodge.

A shaft connecting one level with another, but not reaching the surface; a winze.

A round pit of stone, lined with clay, for receiving metal on its first fusion.