- Eon, a variation of aeon, is defined as a unit of geological time equal to a billion years, or a very long period of time.
- An example of an eon is the unit of measure used when talking about how long ago the solar system was created.
- An example of an eon is the amount of time since dinosaurs roamed the earth.
eon definition by Webster's New World
- an extremely long, indefinite period of time; thousands and thousands of years
- the major unit of geologic time, usually subdivided into eras
- a billion years
Origin: Late Latin ; from Classical Greek aiōn, an age, lifetime, eternity ; from Indo-European base an unverified form aiw-, vitality: see aye
eon definition by American Heritage Dictionary
- An indefinitely long period of time; an age.
- The longest division of geologic time, containing two or more eras.
Origin: Late Latin aeōn, from Greek aiōn; see aiw- in Indo-European roots.
eon - Science Definition