eons

3 definitions • 4 examples

a period of time that is so long that it cannot be measured:

Across the eons, religion has provided structure in human lives.

informal I've been waiting eons for my new computer.

a period of time of one thousand million years:

Scientists guessed that this might be a volcanic rock that had remained unaltered for eons.

the longest period of time in which the history of the earth is measured, which can be divided into eras:

The first eon was the Hadean, starting with the formation of the Earth and lasting over 600 million years until the Archean eon.