Merriam-Webster's Collegiate® Dictionary, 11th Edition
ETERNAL
I. adjective see: aye
Date: 14th century
1. having infinite duration ; everlasting , of or relating to eternity, characterized by abiding fellowship with God ,
2. continued without intermission ; perpetual , seemingly endless , infernal , valid or existing at all times ; timeless , eternalize transitive verb eternally adverb eternalness noun
II. noun
Date: 1573
god 1, something eternal