Definitions

1. noun

A very long period of time, especially one that is difficult to measure or count

“The universe has been expanding for billions of eons.”

2. noun

A geological period, especially one of the four long periods of time into which the Earth’s history is divided

“The eon of the Precambrian period saw the emergence of life on Earth.”

3. verb

To last or continue for a very long time

“The company has been eoning its efforts to reduce emissions.”