Noun--Waste matter.
In Metallurgy, it is a waste product taken off molten metal during smelting, essentially metallic in character.
In British,it is a coal of little value.
Sample Usage
1) He was wide-awake and his mind worked clearly, purged of all dross.
2) Mary discarded the dross after recycling the timber pulp.
3)All the meeting's discussion ended up dross.
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