Thayer's Greek Lexicon

 1. the vaulted expanse of the sky with all things visible in it
  1) the universe, the world
  2) the aerial heavens or sky, the region where the clouds and
the tempests gather, and where thunder and lightning are
produced
  3) the sidereal or starry heavens
2. the region above the sidereal heavens, the seat of order of
things eternal and consummately perfect where God dwells and
other heavenly beings