eon

• aeon (chiefly British or Gnostic)
• æon (dated, chiefly British or Gnostic)

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

• (US, Canada) IPA^(key): /ˈi.ɑn/, /ˈeɪ.ɑn/

  • Audio (US):

    (file)

• (UK) IPA^(key): /ˈiː.ən/, /ˈiː.ɒn/, /ˈeɪ.ɒn/
  • Homophone: Ian
• (General Australian)

  • Audio (General Australian):

    (file)

• Rhymes: -iːɒn, (UK) -iːən

eon (plural eons)

1. Eternity, the duration of the universe.
2. An immeasurably or indefinitely long period of time.
3. (US, informal, hyperbolic) A long period of time.

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

   • 1990, Judith Martin, Miss Manners’ Guide for the Turn-of-the-Millennium (A Fireside Book), New York, N.Y.: Simon & Schuster, →ISBN, page 453:

     Traditionally, a luncheon is a lunch that takes an eon.

4. (astronomy, geology) A period of one billion (short scale, i.e. 1,000,000,000) years.
   • 2012 January, Robert L. Dorit, “Rereading Darwin”, in American Scientist‎^[1], volume 100, number 1, archived from the original on 14 November 2012, page 23:

     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.

6. (geology) The longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras.
7. (Gnosticism, usually spelled aeon or æon) A spirit being emanating from the Godhead.

• -one, NEO, NOE, Neo, Noe, eno-, neo, neo-, one

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

• Audio:

  (file)

eon m or n (plural eonen, diminutive eoontje n or eonnetje n)

1. eon; eternity
2. (geology) eon, aeon
3. (informal, hyperbolically) eon
4. a period of 1,000,000,000 years
5. (Gnosticism) eon

• eeuw

• neo-

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

eon n (definite singular eonet, indefinite plural eon or eoner, definite plural eona or eonene)

1. eon; eternity
2. (geology) eon, aeon
3. (informal, hyperbolically) eon
4. A period of 1,000,000,000 years.
5. (Gnosticism) eon

• “eon” in The Ordnett Dictionary

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

eon n (definite singular eonet, indefinite plural eon, definite plural eona)

1. eon; eternity
2. (geology) eon, aeon
3. (informal, hyperbolically) eon
4. A period of 1,000,000,000 years.
5. (Gnosticism) eon

Learned borrowing from Late Latin aeōn.

• IPA^(key): /ˈɛ.ɔn/

• Audio:

  (file)

• Rhymes: -ɛɔn
• Syllabification: e‧on

eon m inan

1. eon (immeasurably or indefinitely long period of time)

   Synonyms: era, wiek

2. (geology) eon (longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras)

eon m animal

1. (Gnosticism) aeon (spirit being emanating from the Godhead)

• eon in Polish dictionaries at PWN
• eon in PWN's encyclopedia

Borrowed from French éon.

eon m (plural eoni)

1. eon

• IPA^(key): /ěoːn/
• Hyphenation: e‧on

èōn m inan (Cyrillic spelling ѐо̄н)

1. eon

• “eon”, in Hrvatski jezični portal [Croatian language portal] (in Serbo-Croatian), 2006–2025

eon c

1. eon; eternity
2. (geology) eon

• eon in Svensk ordbok (SO)
• eon in Svenska Akademiens ordlista (SAOL)
• eon in Svenska Akademiens ordbok (SAOB)

• Neo