1. (

• eonian ,
• aeonian

) of or relating to a geological eon (longer than an era) ;

2. (

• ageless ,
• aeonian ,
• eonian ,
• eternal ,
• everlasting ,
• perpetual ,
• unending ,
• unceasing

) continuing forever or indefinitely; "the ageless themes of love and revenge"; "eternal truths"; "life everlasting"; "hell's perpetual fires"; "the unending bliss of heaven" ;