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# eon

noun (an eon, eons); UK also aeon

«eon» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. An eon is an extremely long period of time, too long to count easily. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#m1)
2. (science) In geology an eon is the biggest division of Earth's history, lasting hundreds of millions of years or more. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#m2)
3. (informal) Eons means a very long time, as in «I waited for eons». [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#m3)

### In the lessons

Science (Earth's history, rocks, fossils) and everyday exaggeration. Phrases: for eons, eons ago, the Phanerozoic eon.

### Examples

- Rocks form over eons. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#x1)
- Dinosaurs lived eons before people. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#x2)
- I've been waiting for eons! [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#x3)
- The Earth's history is split into eons, eras and periods. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#x4)
- The canyon was carved by the river over eons. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#x5)
- It feels like eons since summer. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/#x6)

### Note

UK spelling often aeon; US eon. Said «EE-on». In geology an eon is longer than an era, which is longer than a period. «Eons» in speech is an exaggeration, not a real count.

## On Mova

- [Trees and pragmatics of «eon» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/E/eon/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«eon» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/eon.html) on Mova free.