Easton's Bible Dictionary: M. G. Easton, M.A., D.D.

Aven

Nothingness; vanity.

1. Hosea speaks of the "high places of Aven" (Hos. 10:8), by which he means Bethel. He also calls it Beth-aven, i.e., "the house of vanity" (4:15), on account of the golden calves Jeroboam had set up there (1 Ki. 12:28).
2. Translated by the LXX. "On" in Ezek. 30:17. The Egyptian Heliopolis or city of On (q.v.).
3. In Amos 1:5 it denotes the Syrian Heliopolis, the modern Baalbec.