eon.
Eternity, the duration of the universe.
Meaning & usage
Eternity, the duration of the universe.
An immeasurably or indefinitely long period of time.
A long period of time.
It’s been eons since we last saw each other.
A period of one billion (short scale, i.e. 1,000,000,000) years; a gigayear.
The longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras.
A spirit being emanating from the Godhead.
Where this word comes from
From Latin aeon, from Ancient Greek αἰών (aiṓn, “age, era”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.