aeon

noun7

1. •
   An immeasurably or indefinitely long period of time.
2. •
   (informal) A long period of time.

   • It’s been eons since we last saw each other.
3. •
   A period of one billion (short scale, i.e. 1,000,000,000) years; a gigayear.
4. •
   The longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras.
5. •
   Eternity, the duration of the universe.
6. •
   A spirit being emanating from the Godhead.
7. •
   Each universe in a series of universes, according to conformal cyclic cosmology.