eons

Noun

eon (plural eons)

1. Eternity, the duration of the universe.
2. An immeasurably or indefinitely long period of time.
3. (US, excessive, informal) A long period of time.
   • It’s been eons since we last saw each other.
4. A period of one billion (short scale, i.e. 1,000,000,000) years; a gigayear.
   • We live our lives in three dimensions for our threescore and ten allotted years. Yet every branch of contemporary science, from statistics to cosmology, alludes to processes that operate on scales outside of human experience: the millisecond and the nanometer, the eon and the light-year.2012 January, Robert L. Dorit, “Rereading Darwin”, in American Scientist, volume 100, number 1, archived from the original on 14 Nov 2012, page 23
5. The longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras.
6. A spirit being emanating from the Godhead.

See all 7 meanings of eon