'Unclean' in the Bible

They also tore down the sacred pillar of Baal and tore down the house of Baal, and made it into a latrine [forever unclean] to this day.

And he made all the priests from the towns of Judah come into Jerusalem, and he made unclean the high places where the priests had been burning offerings, from Geba to Beer-sheba; and he had the high places of the evil spirits pulled down which were by the doorway of Joshua, the ruler of the town, on the left side of the way into the town.

And Topheth, in the valley of the sons of Hinnom, he made unclean, so that no man might make his son or his daughter go through the fire to Molech.

And the high places before Jerusalem, on the south side of the mountain of destruction, which Solomon, king of Israel, had made for Ashtoreth, the disgusting god of the Zidonians, and for Chemosh, the disgusting god of Moab, and for Milcom, the disgusting god of the children of Ammon, the king made unclean.

Then Josiah, turning round, saw on the mountain the places of the dead, and he sent and had the bones taken out of their places and burned on the altar, so making it unclean, as the Lord had said by the man of God when Jeroboam was in his place by the altar on that feast-day. And he, turning his eyes to the resting-place of the man of God who had given word of these things, said: