empyrean in WordNet English dictionary

1. the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
   celestial sphere  sphere  empyrean  firmament  heavens  vault of heaven  welkin 
   

1. of or relating to the sky or heavens
   "the empyrean sphere"
   empyrean  empyreal 
   
2. inspiring awe
   "well-meaning ineptitude that rises to empyreal absurdity"- M.S.Dworkin; "empyrean aplomb"- Hamilton Basso; "the sublime beauty of the night"
   empyreal  empyrean  sublime