Sump (?), n. [Cf. G. sumpf a sump in a mine, a swamp, akin to LG. sump, D. somp a swamp, Dan. & Sw. sump, and perhaps to E. swamp.]
1. Metal.
A round pit of stone, lined with clay, for receiving the metal on its first fusion.
Ray.
2.
The cistern or reservoir made at the lowest point of a mine, from which is pumped the water which accumulates there.
3.
A pond of water for salt works.
Knight.
4.
A puddle or dirty pool.
[Prov. Eng.]
Sump fuse, a fuse used in blasting under water. -- Sump men Mining, the men who sink the sump in a mine.
© Webster 1913.