Standard Lemma guide

eon

name · noun · 10 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Canada, US: /ˈi.ɑn/
  • Canada, US: /ˈeɪ.ɑn/
  • US: Recorded audio is listed in the source snapshot.
  • UK: /ˈiː.ɔn/
  • UK: /ˈeɪ.ɔn/
  • UK, dated: /ˈiː.ən/
  • homophone: (dated pronunciation) Ian
  • Australian: /ˈiː.ɔn/
  • Australian: /ˈeɪ.ɔn/
  • Australia: Recorded audio is listed in the source snapshot.
  • rhymes with -iːɒn
  • rhymes with (UK, dated) -iːən
  • CMU ARPABET: IY1 AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
  • CMU ARPABET 2: IY1 AA0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

name

Meaning 1

The Greek National Organisation of Youth, similar to the Hitler Youth. It was formed before WWII and disbanded in 1941.

Definition source: English Wiktionary via Wiktextract

Topics: government, politics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Eternity, the duration of the universe.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

An immeasurably or indefinitely long period of time.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A long period of time.

Definition source: English Wiktionary via Wiktextract

Usage: US, excessive, informal

Examples

  • It’s been eons since we last saw each other.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A period of one billion (short scale, i.e. 1,000,000,000) years; a gigayear.

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, geography, geology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

The longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras.

Definition source: English Wiktionary via Wiktextract

Topics: geography, geology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

A spirit being emanating from the Godhead.

Definition source: English Wiktionary via Wiktextract

Topics: Gnosticism, lifestyle, religion

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

(Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: aeon

Antonyms: none provided

Broader terms: spiritual being, supernatural being

9

noun

Meaning 9

an immeasurably long period of time

Definition source: Princeton WordNet 3.0

Examples

  • oh, that happened eons ago

Meaning relationships

Synonyms: aeon

Antonyms: none provided

Broader terms: long time, age, years

10

noun

Meaning 10

the longest division of geological time

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: aeon

Antonyms: none provided

Broader terms: geological time, geologic time

Narrower terms: Phanerozoic, Phanerozoic eon, Phanerozoic aeon, Precambrian, Precambrian eon, Precambrian aeon, Precambrian period, Proterozoic, Proterozoic eon, Proterozoic aeon, Archean, Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon, Hadean, Hadean time, Hadean eon, Hadean aeon, Priscoan, Priscoan eon, Priscoan aeon

History

Etymology

From Greek ΕΟΝ (EON), short for Εθνική Οργάνωση Νεολαίας.

From Latin aeon, from Ancient Greek αἰών (aiṓn, “age, era”).

Across languages

Translations

79 source translations are retained for this English entry.

  • Bulgarian: вечност (večnost) — eternity
  • Czech: věčnost — eternity
  • Dutch: eeuwigheid — eternity
  • Dutch: eterniteit — eternity
  • Dutch: sempiterniteit — eternity
  • Finnish: ikuisuus — eternity
  • Finnish: iäisyys — eternity
  • Finnish: iänkaikkisuus — eternity
  • French: éternité — eternity
  • Hindi: अनंतकाल (anantkāl) — eternity
  • Norwegian: eon — eternity
  • Polish: wieczność — eternity
  • Portuguese: eternidade — eternity
  • Russian: ве́чность (véčnostʹ) — eternity
  • Serbo-Croatian: eon — eternity
  • Serbo-Croatian: vječnost — eternity
  • Spanish: eón — eternity
  • Spanish: eternidad — eternity
  • Swedish: evighet — eternity
  • Turkish: sonsuzluk — eternity
  • Czech: eon — period of 1,000,000,000 years
  • Dutch: eon — period of 1,000,000,000 years
  • French: éon — period of 1,000,000,000 years
  • Irish: aeón — period of 1,000,000,000 years
  • Norwegian: eon — period of 1,000,000,000 years
  • Portuguese: éon — period of 1,000,000,000 years
  • Serbo-Croatian: eon — period of 1,000,000,000 years
  • Spanish: eón — period of 1,000,000,000 years
  • Catalan: eó — geochronologic unit
  • Chinese Mandarin: 宙 (zhòu) — geochronologic unit
  • Czech: věk — geochronologic unit
  • Dutch: eon — geochronologic unit
  • Esperanto: eono — geochronologic unit
  • Finnish: aioni — geochronologic unit
  • French: éon — geochronologic unit
  • German: Äon — geochronologic unit
  • Hebrew: עִדָּן (idán) — geochronologic unit
  • Irish: aeón — geochronologic unit
  • Italian: eone — geochronologic unit
  • Japanese: 累代 (ruidai) — geochronologic unit
  • Kazakh: эон (éon) — geochronologic unit
  • Korean: 누대 (nudae) — geochronologic unit
  • Korean: 이언 (ieon) — geochronologic unit
  • Norwegian: eon — geochronologic unit
  • Polish: eon — geochronologic unit
  • Portuguese: éon — geochronologic unit
  • Russian: эо́н (eón) — geochronologic unit
  • Serbo-Croatian: eon — geochronologic unit
  • Spanish: eón — geochronologic unit
  • Spanish: evo — geochronologic unit
  • Swedish: eon — geochronologic unit
  • Bulgarian: вечност (večnost) — informal, hyperbolic: a long period of time
  • Czech: celá věčnost — informal, hyperbolic: a long period of time
  • Dutch: eon — informal, hyperbolic: a long period of time
  • Esperanto: eono — informal, hyperbolic: a long period of time
  • Finnish: ikuisuus — informal, hyperbolic: a long period of time
  • Finnish: maailmankausi — informal, hyperbolic: a long period of time
  • French: bail — informal, hyperbolic: a long period of time
  • Hebrew: עִדָּן (idán) — informal, hyperbolic: a long period of time
  • Italian: eone — informal, hyperbolic: a long period of time
  • Māori: pōpōroa — informal, hyperbolic: a long period of time
  • Māori: pōpōroroa — informal, hyperbolic: a long period of time
  • Māori: manomano tau — informal, hyperbolic: a long period of time
  • Norwegian: eon — informal, hyperbolic: a long period of time
  • Portuguese: eternidade — informal, hyperbolic: a long period of time
  • Russian: ты́сяча лет (týsjača let) — informal, hyperbolic: a long period of time
  • Russian: целая ве́чность (celaja véčnostʹ) — informal, hyperbolic: a long period of time
  • Serbo-Croatian: eon — informal, hyperbolic: a long period of time
  • Spanish: añares — informal, hyperbolic: a long period of time
  • Spanish: añales — informal, hyperbolic: a long period of time
  • Swedish: eon — informal, hyperbolic: a long period of time
  • Swedish: evighet — informal, hyperbolic: a long period of time
  • Czech: eon — a being emanating from the Godhead
  • Italian: eone — a being emanating from the Godhead
  • Japanese: アイオーン (aiōn) — a being emanating from the Godhead
  • Norwegian: eon — a being emanating from the Godhead
  • Polish: eon — a being emanating from the Godhead
  • Portuguese: éon — a being emanating from the Godhead
  • Russian: эо́н (eón) — a being emanating from the Godhead