aeon aeon /ˈiːɒn/

noun

1. () (Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe  ( eon , aeon )
   (Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe
   
   
2. An immeasurably long period of time  ( aeon , eon )
   an immeasurably long period of time
    Oh, that happened eons ago
   oh, that happened eons ago
   
3. The longest division of geological time  ( aeon , eon )
   the longest division of geological time