'Fornication' in the Bible

Moreover he made high places on the mountains of Judah, and caused the inhabitants of Jerusalem to commit fornication, and compelled Judah thereto.

but hast walked in the way of the kings of Israel, and hast made Judah and the inhabitants of Jerusalem to commit fornication, like the fornications of the house of Ahab, and also hast slain thy brethren, thy father's house who were better than thyself: