aeon
noun
ae·on
chiefly British spelling of eon
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
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Cite this Entry
“Aeon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aeon. Accessed 30 Nov. 2024.
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