# eon

> English word · Noun · IPA /ˈi.ɑn/ · frequency rank #41,614

## Definitions
1. Eternity, the duration of the universe.
2. An immeasurably or indefinitely long period of time.
3. A long period of time.
4. A period of one billion (short scale, i.e. 1,000,000,000) years.
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.

## Etymology
From Latin aeon, from Ancient Greek αἰών (aiṓn, “age, era”).

## Easily confused with
- **ex** (https://plainspell.com/en/vs/eon-vs-ex)
- **et** (https://plainspell.com/en/vs/eon-vs-et)
- **EU** (https://plainspell.com/en/vs/eon-vs-eu)
- **er** (https://plainspell.com/en/vs/eon-vs-er)
- **EP** (https://plainspell.com/en/vs/eon-vs-ep)
- **ES** (https://plainspell.com/en/vs/eon-vs-es)
- **EV** (https://plainspell.com/en/vs/eon-vs-ev)
- **ew** (https://plainspell.com/en/vs/eon-vs-ew)
- **ey** (https://plainspell.com/en/vs/eon-vs-ey)
- **ez** (https://plainspell.com/en/vs/eon-vs-ez)
- **eye** (https://plainspell.com/en/vs/eon-vs-eye)
- **era** (https://plainspell.com/en/vs/eon-vs-era)
- **eve** (https://plainspell.com/en/vs/eon-vs-eve)
- **est** (https://plainspell.com/en/vs/eon-vs-est)
- **EPA** (https://plainspell.com/en/vs/eon-vs-epa)
- **EVA** (https://plainspell.com/en/vs/eon-vs-eva)
- **EPS** (https://plainspell.com/en/vs/eon-vs-eps)
- **err** (https://plainspell.com/en/vs/eon-vs-err)
- **eta** (https://plainspell.com/en/vs/eon-vs-eta)
- **ESA** (https://plainspell.com/en/vs/eon-vs-esa)

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/eon