eon

noun
UK: /ˈiː.ɒn/
US: /ˈiː.ɑːn/

  1. A very long period of time.

    1. It took an eon to get through the airport security line.
    2. Civilizations rose and fell over the eon, leaving behind only whispers of their existence.

  2. A unit of geological time equal to a billion years.

    1. The Precambrian eon is the earliest part of Earth's history.
    2. Life began to diversify rapidly towards the end of the Proterozoic eon according to fossil records.

Synonyms

age era period eternity

Frequently Asked Questions

The word "eon" in English means: A very long period of time., A unit of geological time equal to a billion years..

The phonetic transcription of "eon" is /ˈiː.ɒn/ in British English and /ˈiː.ɑːn/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "eon": age, era, period, eternity.

Example usage of "eon": "It took an eon to get through the airport security line.". More examples on the page.