variants
or chiefly British aeon
1
: an immeasurably or indefinitely long period of time : age
I haven't seen him in eons.
2
a
: a very large division of geologic time usually longer than an era
the Archean eon
b
: a unit of geologic time equal to one billion years
Examples of eon in a Sentence
Recent Examples on the Web
Scientists suspect the Neretva Vallis channel was carved out eons ago, by water gushing into the crater.
—
Sharmila Kuthunur, Space.com, 14 Mar. 2025
But while sometimes gaming is immune to inflation (like the $60 game price point that lasted eons and only just moved up to $70), there are also other issues to consider like the current Switch chip costing $80 a unit, while the new one, an analyst estimates, may be $130-$150 instead.
—Paul Tassi, Forbes, 14 Mar. 2025
Inside, the craggy walls of the massive chamber are a rainbow of reds, oranges, yellows and greens, thanks to eons of mineral deposits.
—Emily Matchar, Smithsonian Magazine, 27 Jan. 2025
In contrast to the regional and historical topics of the first two editions, science and technology are by definition rapidly evolving, and five years can represent an eon of development and change.
—Bryan Barcena, Artforum, 1 Jan. 2025
See All Example Sentences for eon
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Sharmila Kuthunur, Space.com, 14 Mar. 2025
But while sometimes gaming is immune to inflation (like the $60 game price point that lasted eons and only just moved up to $70), there are also other issues to consider like the current Switch chip costing $80 a unit, while the new one, an analyst estimates, may be $130-$150 instead.
—Paul Tassi, Forbes, 14 Mar. 2025
Inside, the craggy walls of the massive chamber are a rainbow of reds, oranges, yellows and greens, thanks to eons of mineral deposits.
—Emily Matchar, Smithsonian Magazine, 27 Jan. 2025
In contrast to the regional and historical topics of the first two editions, science and technology are by definition rapidly evolving, and five years can represent an eon of development and change.
—Bryan Barcena, Artforum, 1 Jan. 2025
See All Example Sentences for eon
Cite this Entry
“Eon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eon. Accessed 19 Apr. 2025.
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