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eon

[ee-uh n, ee-on] /ˈi ən, ˈi ɒn/
noun
1.
an indefinitely long period of time; age.
2.
the largest division of geologic time, comprising two or more eras.
3.
Astronomy. one billion years.
Also, aeon.
Origin
see aeon
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for eon
  • Psychiatry is a eon behind any such revelation of the untoward ontology of nightmares.
  • We long to hold on to those rituals and traditions of eon that still resonate, while making new meaning from the ether.
British Dictionary definitions for eon

aeon

/ˈiːən; ˈiːɒn/
noun
1.
an immeasurably long period of time; age
2.
a period of one thousand million years
3.
(often capital) (gnosticism) one of the powers emanating from the supreme being and culminating in the demiurge
Word Origin
C17: from Greek aiōn an infinitely long time

eon

/ˈiːən; ˈiːɒn/
noun
1.
the usual US spelling of aeon
2.
(geology) the longest division of geological time, comprising two or more eras
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for eon
eon
1640s, from L. aeon, from Gk. aion "age, vital force, lifetime," from PIE base *aiw- "vital force, life, long life, eternity" (cf. Skt. ayu "life," Avestan ayu "age," L. aevum "space of time, eternity," Goth. aiws "age, eternity," O.N. ævi "lifetime," Ger. ewig "everlasting," O.E. a "ever, always").
Online Etymology Dictionary, © 2010 Douglas Harper
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eon in Science
eon
  (ē'ŏn')   
The longest division of geologic time, containing two or more eras.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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3
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