Skip to main content
eon

eon

31 6.8
A very long time that feels almost endless
  • noun
  • /ˈiːən/
  • US
translation icon : eternidad
  • And that's how we have progressed for centuries and eons and millenniums.
  • eons of time

And it, it, it every section of the book took you through eons and Earth's development.

Autoplay Next

Examples

  • We had a little thing, like, eons ago.

  • These particles drifted for eons and light years until gravity and change brought them together here now.

  • OK, first of all, the human brain and the human body have been on this planet for many, many, many eons, right?

  • For the first time in all these eons, I get it.

    Fiction book (1999)
  • You know, these bugs have always been here throughout the eons of time.

  • I've been stuck in that job for eons.

  • We cannot simply conduct experiments to test ideas about the evolutionary events that occurred eons ago.

    Academic text (2007)
  • It was created by plants over the course of, you know, eons and eons of time.

  • Eons passed.

  • Some stars are so far away that it takes eons for their light to get to Earth.

Synonyms

eternity
vseon
224 5.8

Time that never ends, often imagined after death

is used more for long, indefinite periods in geology or as hyperbole
forever
vseon
12 1.4

A very long time with no end

is less absolute and refers to extremely long but possibly finite periods

Compounds

Archean eon
  • Specialized
9.9

A time about 3.8 to 2.5 billion years ago when the Earth's crust formed and single-celled life began

Archeozoic eon
  • Specialized
9.9

A very early time on Earth when the first rocks formed and only one-celled life existed

Hadean eon
  • Specialized
9.9

The first time after Earth formed, about 4.6 to 4 billion years ago, before rocks or life

Priscoan eon
  • Specialized
9.9

A very early time on Earth from its formation until about 3,800 million years ago with no signs of life

Proterozoic eon
  • Specialized
9.9

A very long period in Earth's history from about 2,500 to 544 million years ago when simple life appeared

Phanerozoic eon
  • Specialized
9.9

A time in Earth's history from about 540 million years ago to now when many kinds of life appear

Precambrian eon
  • Specialized
9.9

A long period in Earth's history from about 3,800 million to 544 million years ago

How Long

eon
  • US
31 6.8
age
332 7.7
long time
1.0
while
1.0
moment
1.0

Surface Forms

eon singular
eons plural

Etymology

Eon comes from the Greek word aiōn, which means 'age' or 'life', so a helpful way to remember it is to think of an 'age' that lasts a very long time. That's why people say something took eons when it felt like ages.