Aven (â'ven), nothingness. 1. The name applied to the city elsewhere called On, or Heliopolis. Ezekiel 30:17. 2. A contracted form, Hosea 10:8, of Beth-aven, i.e., Bethel. 3. A place mentioned by Amos 1:5, called Bikath-aven, in the margin of A. V. It seems to be a "plain" or valley in Lebanon, where Baalbek is situated, still called el Bukâʾa.