empyrean
Concise Oxford English Dictionary © 2008 Oxford University Press:
empyrean /ˌɛmpʌɪˈriːən, -pɪ-, ɛmˈpɪrɪən/
▶adjective literary relating to heaven. ▶noun (the empyrean) the highest part of heaven, thought by the ancients to be the realm of pure fire.
■ literary the sky.
– derivatives
empyreal /ˌɛmpʌɪˈriːəl, -pɪ-, ɛmˈpɪrɪəl/ adjective.
empyreal /ˌɛmpʌɪˈriːəl, -pɪ-, ɛmˈpɪrɪəl/ adjective.
– origin ME: via med. L. from Gk empurios, from en- ‘in’ + pur ‘fire’.
'empyrean' also found in these Oxford entries:

