ChristianAnswers.Net WebBible Encyclopedia
Meaning: nothingness; vanity
Hosea speaks of the “high places of Aven” (10:8), by which he means Bethel. He also calls it Beth-aven, i.e., “the house of vanity” (4:15), because of the golden calves Jeroboam had set up there (1 Kings 12:28).
Translated by the LXX “On” in Ezek. 30:17. The Egyptian Heliopolis or city of On.
In Amos 1:5 it denotes the Syrian Heliopolis, the modern Baalbec.