Thayer's Greek Lexicon

 1. to consume by eating, to eat up, devour
  1) of birds
  2) of a dragon
  3) of a man eating up the little book
2. metaph.
  1) to devour i.e. squander, waste: substance
  2) to devour i.e. forcibly appropriate: widows' property
  3) to strip one of his goods
1c1. to ruin (by the infliction of injuries)
  4) by fire, to devour i.e. to utterly consume, destroy
  5) of the consumption of the strength of body and mind by
strong emotions