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
For eons this vital waterway has attracted animals and humans alike, and has been the foundation for agricultural cultures from prehistoric times to the modern day.
—
Roger Naylor, The Arizona Republic, 7 Mar. 2024
For eons, any water that might have accumulated there will have been preserved as ice.
—David W. Brown, The New Yorker, 4 Mar. 2024
The southern route into the park, along the winding two-lane Badwater Road, cuts through rugged, dramatic topography, shaped by eons of erosion.
—Reis Thebault, Washington Post, 1 Mar. 2024
Over eons, the softer sedimentary rocks around the immense bulge of hard stone washed away.
—Mark Jenkins, Smithsonian Magazine, 2 Apr. 2024
From a numbers standpoint, the region has its best chance in eons to end that drought.
—Jon Wilner, The Mercury News, 17 Mar. 2024
But the young-moons story is far from certain — the sheer number of craters many display suggests that the moons have been around to experience the solar system’s pinball-like pandemonium for many an eon.
—Quanta Magazine, 2 Nov. 2023
This union lasted yet another decade, from 1979 to 1988, a second eon in rock marriages.
—Guy Martin, Forbes, 28 Feb. 2024
Finding molecular water on Iris and Massalia, in particular, suggests liquid water can exist for eons on space rocks in the inner solar system—contrary to previous assumptions that any water would have evaporated from these asteroids under the heat of the sun.
—Catherine Duncan, Smithsonian Magazine, 16 Feb. 2024
Roger Naylor, The Arizona Republic, 7 Mar. 2024
For eons, any water that might have accumulated there will have been preserved as ice.
—David W. Brown, The New Yorker, 4 Mar. 2024
The southern route into the park, along the winding two-lane Badwater Road, cuts through rugged, dramatic topography, shaped by eons of erosion.
—Reis Thebault, Washington Post, 1 Mar. 2024
Over eons, the softer sedimentary rocks around the immense bulge of hard stone washed away.
—Mark Jenkins, Smithsonian Magazine, 2 Apr. 2024
From a numbers standpoint, the region has its best chance in eons to end that drought.
—Jon Wilner, The Mercury News, 17 Mar. 2024
But the young-moons story is far from certain — the sheer number of craters many display suggests that the moons have been around to experience the solar system’s pinball-like pandemonium for many an eon.
—Quanta Magazine, 2 Nov. 2023
This union lasted yet another decade, from 1979 to 1988, a second eon in rock marriages.
—Guy Martin, Forbes, 28 Feb. 2024
Finding molecular water on Iris and Massalia, in particular, suggests liquid water can exist for eons on space rocks in the inner solar system—contrary to previous assumptions that any water would have evaporated from these asteroids under the heat of the sun.
—Catherine Duncan, Smithsonian Magazine, 16 Feb. 2024
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'eon.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near eon
Cite this Entry
“Eon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eon. Accessed 19 Apr. 2024.
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