/em pir"ee euhl, -puy"ree-, em'peuh ree"euhl, -puy-/ , adj.
1. pertaining to the highest heaven in the cosmology of the ancients.
2. pertaining to the sky; celestial: empyreal blue.
3. formed of pure fire or light: empyreal radiance.
Also, empyrean .
[ 1475-85; empyre ( us ), var. of empyrius ( empýrios fiery, equiv. to em- EM- 2 + pyr fire + -ios adj. suffix) + -AL 1 ]