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
Bambi was eons ahead of his time.
—
Nick Canepa, San Diego Union-Tribune, 25 Apr. 2026
What to read next The findings also show that water ice is not evenly distributed but instead concentrates in the densest regions of cosmic dust, which act as protective shields and block harsh ultraviolet radiation from nearby newborn stars and allow those fragile molecules to survive across eons.
—Sharmila Kuthunur, Space.com, 23 Apr. 2026
This grand procession of Edmonia’s work is an act of reclamation—a gathering in her name that shouts through stone and into the eons.
—Tyehimba Jess, ARTnews.com, 17 Apr. 2026
That person belongs to a different time, to a different town and to people who cannot be expected to remain the same, any more than the slopes of a volcano can be expected to still be molten rock an eon after the last eruption.
—Jessica Kiang, Variety, 17 Apr. 2026
See All Example Sentences for eon
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Nick Canepa, San Diego Union-Tribune, 25 Apr. 2026
What to read next The findings also show that water ice is not evenly distributed but instead concentrates in the densest regions of cosmic dust, which act as protective shields and block harsh ultraviolet radiation from nearby newborn stars and allow those fragile molecules to survive across eons.
—Sharmila Kuthunur, Space.com, 23 Apr. 2026
This grand procession of Edmonia’s work is an act of reclamation—a gathering in her name that shouts through stone and into the eons.
—Tyehimba Jess, ARTnews.com, 17 Apr. 2026
That person belongs to a different time, to a different town and to people who cannot be expected to remain the same, any more than the slopes of a volcano can be expected to still be molten rock an eon after the last eruption.
—Jessica Kiang, Variety, 17 Apr. 2026
See All Example Sentences for eon
Cite this Entry
“Eon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eon. Accessed 28 Apr. 2026.
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