01 n. A round pit of stone, lined with clay, for receiving the metal on its first fusion.
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1.
A round pit of stone, lined with clay, for receiving the metal on its first fusion.(Metal.)
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2.
The cistern or reservoir made at the lowest point of a mine, from which is pumped the water which accumulates there.
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3.
A pond of water for salt works.
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4.
A puddle or dirty pool.[Prov. Eng.]
Phrases & compounds
Sump fuse —
a fuse used in blasting under water.
Sump men —
the men who sink the sump in a mine.