Aeonian (Adjective)
Meaning 1
Continuing forever or indefinitely; "the ageless themes of love and revenge"; "eternal truths"; "life everlasting"; "hell's perpetual fires"; "the unending bliss of heaven".
Classification
All adjective clusters.
Synonyms
Meaning 2
Of or relating to a geological eon (longer than an era).
Classification
Relational adjectives (pertainyms).