Definition of "Abaddon"

Abaddon

/əˈbæ.dn̩/

proper noun
1. The destroyer, or angel of the bottomless pit; Apollyon;
2. (poetic) Hell; the bottomless pit; a place of destruction.
  Quotations
  In all her gates, Abaddon rues Thy bold attempt.
  1671, John Milton, “The Fourth Book”, in Paradise Regain’d. A Poem. In IV Books. To which is Added, Samson Agonistes, London: […] J. M[acock] for John Starkey […], page 4