|Easton's Bible Dictionary|
The impurities of silver separated from the one in the process of melting (Proverbs 25:4; 26:23; Psalm 119:119). It is also used to denote the base metal itself, probably before it is smelted, in Isaiah 1:22, 25.
Noah Webster's Dictionary
1. (n.) The scum or refuse matter which is thrown off, or falls from, metals in smelting the ore, or in the process of melting; recrement.
2. (n.) Rust of metals.
3. (n.) Waste matter; any worthless matter separated from the better part; leavings; dregs; refuse.
Int. Standard Bible Encyclopedia
dros (sigh): The refuse of smelting of precious metal (Proverbs 25:4; Proverbs 26:23); used figuratively of what is base or worthless (Isaiah 1:22, 25 Ezekiel 22:18, 19 Psalm 119:119).
Dross (7 Occurrences)
Psalms 119:119 You put away all the wicked of the earth like dross. Therefore I love your testimonies. (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)
Proverbs 25:4 Take away the dross from the silver, and material comes out for the refiner; (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)
Proverbs 26:23 Like silver dross on an earthen vessel are the lips of a fervent one with an evil heart. (WEB KJV JPS ASV DBY WBS YLT NAS)
Isaiah 1:22 Your silver has become dross, your wine mixed with water. (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)
Isaiah 1:25 and I will turn my hand on you, thoroughly purge away your dross, and will take away all your tin. (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)
Ezekiel 22:18 Son of man, the house of Israel is become dross to me: all of them are brass and tin and iron and lead, in the midst of the furnace; they are the dross of silver. (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)
Ezekiel 22:19 Therefore thus says the Lord Yahweh: Because you have all become dross, therefore, behold, I will gather you into the midst of Jerusalem. (WEB KJV JPS ASV DBY WBS YLT NAS RSV NIV)