Meanings
eon1
plural eons · alternative Commonwealth aeon · alternative dated æon
- An immeasurably or indefinitely long period of time.
- USexcessiveinformalA long period of time.
It’s been eons since we last saw each other.
1 more example
Traditionally, a luncheon is a lunch that takes an eon.
1990, Judith Martin, Miss Manners’ Guide for the Turn-of-the-Millennium (A Fireside Book), New York, N.Y.: Simon & Schuster, →ISBN, page 453 - astronomyA period of one billion (short scale, i.e. 1,000,000,000) years; a gigayear.
We live our lives in three dimensions for our threescore and ten allotted years. Yet every branch of contemporary science, from statistics to cosmology, alludes to processes that operate on scales outside of human experience: the millisecond and the nanometer, the eon and the light-year.
2012 January 28, Robert L. Dorit, “Rereading Darwin”, in American Scientist, volume 100, number 1, archived from the original on 14 Nov 2012, page 23 - geographyThe longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras.
EON2
- governmentThe Greek National Organisation of Youth, similar to the Hitler Youth. It was formed before WWII and disbanded in 1941.
Synonyms & antonyms
noun(Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
eon · noun
- Ancient Greekαἰών“age, era”
- Latinaeon
- Englisheon
From Latin aeon, from Ancient Greek αἰών (aiṓn, “age, era”).
More words from Latin, Ancient Greek
Full word history & related roots →EON · proper noun
- GreekΕΟΝ
- EnglishEON
From Greek ΕΟΝ (EON), short for Εθνική Οργάνωση Νεολαίας.
More words from Greek
Full word history & related roots →Translations
Bulgarian вечност, вечност
- вечност (večnost)eternity
- вечност (večnost)informal, hyperbolic: a long period of time
Catalan eó
- eógeochronologic unit
Chinese Mandarin 宙
- 宙 (zhòu)geochronologic unit
Czech věčnost, celá věčnost
- věčnosteternity
- celá věčnostinformal, hyperbolic: a long period of time
- věkgeochronologic unit
- eona being emanating from the Godhead
- eonperiod of 1,000,000,000 years
Dutch eeuwigheid, eterniteit
- eeuwigheideternity
- eterniteiteternity
- sempiterniteiteternity
- eoninformal, hyperbolic: a long period of time
- eongeochronologic unit
- eonperiod of 1,000,000,000 years
Esperanto eono, eono
- eonoinformal, hyperbolic: a long period of time
- eonogeochronologic unit
Finnish ikuisuus, iäisyys
- ikuisuuseternity
- iäisyyseternity
- iänkaikkisuuseternity
- ikuisuusinformal, hyperbolic: a long period of time
- maailmankausiinformal, hyperbolic: a long period of time
- aionigeochronologic unit
French éternité, bail
- éternitéeternity
- bailinformal, hyperbolic: a long period of time
- éongeochronologic unit
- éonperiod of 1,000,000,000 years
German Äon
- Äongeochronologic unit
Hebrew עִדָּן, עִדָּן
- עִדָּן (idán)informal, hyperbolic: a long period of time
- עִדָּן (idán)geochronologic unit
Hindi अनंतकाल
- अनंतकाल (anantkāl)eternity
Irish aeón, aeón
- aeóngeochronologic unit
- aeónperiod of 1,000,000,000 years
Italian eone, eone
- eoneinformal, hyperbolic: a long period of time
- eonegeochronologic unit
- eonea being emanating from the Godhead
Japanese 累代, アイオーン
- 累代 (ruidai)geochronologic unit
- アイオーン (aiōn)a being emanating from the Godhead
Korean 누대, 이언
- 누대 (nudae)geochronologic unit
- 이언 (ieon)geochronologic unit
Māori pōpōroa, pōpōroroa
- pōpōroainformal, hyperbolic: a long period of time
- pōpōroroainformal, hyperbolic: a long period of time
- manomano tauinformal, hyperbolic: a long period of time
Norwegian eon, eon
- eoneternity
- eoninformal, hyperbolic: a long period of time
- eongeochronologic unit
- eona being emanating from the Godhead
- eonperiod of 1,000,000,000 years
Polish wieczność, eon
- wiecznośćeternity
- eongeochronologic unit
- eona being emanating from the Godhead
Portuguese eternidade, eternidade
- eternidadeeternity
- eternidadeinformal, hyperbolic: a long period of time
- éongeochronologic unit
- éona being emanating from the Godhead
- éonperiod of 1,000,000,000 years
Russian ве́чность, ты́сяча лет
- ве́чность (véčnostʹ)eternity
- ты́сяча лет (týsjača let)informal, hyperbolic: a long period of time
- целая ве́чность (celaja véčnostʹ)informal, hyperbolic: a long period of time
- эо́н (eón)geochronologic unit
- эо́н (eón)a being emanating from the Godhead
Spanish eón, eternidad
- eóneternity
- eternidadeternity
- añaresinformal, hyperbolic: a long period of time
- añalesinformal, hyperbolic: a long period of time
- eóngeochronologic unit
- evogeochronologic unit
- eónperiod of 1,000,000,000 years
Swedish evighet, eon
- evigheteternity
- eoninformal, hyperbolic: a long period of time
- evighetinformal, hyperbolic: a long period of time
- eongeochronologic unit
Turkish sonsuzluk
- sonsuzluketernity
Rhymes & wordplay
Rhymes with eon
All rhymes →Sounds the same
Anagrams
Cite this entry
eon. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/eon
“eon.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/eon. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “eon,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/eon.
Source: eon on Wiktionary, CC BY-SA 4.0.