'Idolatry' in the Bible

When Jehoram saw Jehu, he asked, "Is everything all right, Jehu?" He replied, "How can everything be all right as long as your mother Jezebel promotes idolatry and pagan practices?"

Then the king commanded Hilkiah the high priest and the priests of the second rank and the doorkeepers to bring out of the temple of the Lord all the articles made for Baal, for [the goddess] Asherah, and for all the [starry] host of heaven; and he burned them outside Jerusalem in the fields of the Kidron, and carried their ashes to Bethel [where Israel’s idolatry began].