Definition of aeon in English:


(US eon)


  • 1often aeonsAn indefinite and very long period of time.

    ‘he reached the crag aeons before I arrived’
    • ‘It has been known for aeons of time that security resides within oneself - it cannot be bought.’
    • ‘The world has been living with contrasts, for aeons.’
    • ‘Ages and aeons ago, when I was in high school, I took a word processing course to fill a credit.’
    • ‘After what seemed like aeons, she finally reached the stairs.’
    • ‘Audiences have been waiting aeons for a good sci-fi flick.’
    • ‘Oh, that's aeons away, almost in the realm of incredible.’
    • ‘Tradition, in fact, takes back the antiquity of the temple, not by centuries, but by aeons.’
    • ‘I'll spend aeons staring at bottles of expensive shampoo humming ‘Maybe this time’.’
    • ‘So in summary, my invention will bring 20 years of happiness followed by aeons of fear and destruction.’
    • ‘With many DVD's, this feature cannot be fast-forwarded so we have to suffer in silence for what seems aeons.’
    • ‘In any case, in earlier aeons, background radiation levels were much greater than today.’
    • ‘Just after that, she started going out with a mutual friend of ours, who I'd dated aeons ago and was still friendly with.’
    • ‘Finally, after what seemed like aeons, they reached what Lia presumed was their destination.’
    • ‘That person, born aeons ago, unknowingly began a multibillion-dollar industry that focuses on treating illness.’
    • ‘It is ages and aeons since I have been to the Hills.’
    • ‘Long-term solutions to the problems affecting them would have been enacted aeons ago.’
    • ‘It's been the stock question of doting aunties for aeons.’
    • ‘In the 21st century, the 1930s seem to be aeons away.’
    • ‘It is being together, without seeing each other for aeons.’
    • ‘The authorities here have finally done something they should have done aeons ago.’
    number of years, lifetime, duration, length of life
    age, epoch, generation, year, time, long period
    View synonyms
    1. 1.1Astronomy Geology A unit of time equal to a thousand million years.
      • ‘Over the eons the lunar spin rate has been damped by Earth's gravity, because the Moon's mass distribution is not uniform.’
      • ‘Stars and galaxies that old are a long way away from us: 13 bn light years, give or take a couple of aeons.’
      • ‘Because they have succumbed to erosion and weathering, perhaps for aeons, these craters are notoriously difficult to spot.’
      • ‘It's a rock place, a world of eons and eras and millions of years conflated to timelessness.’
      • ‘In these places are jagged cliffs falling almost vertical to the tide line, a remnant of aeons of erosion.’
    2. 1.2Geology A major division of geological time, subdivided into eras.
      ‘the Precambrian aeon’
      • ‘The Proterozoic aeon (2,500-540 million years ago) saw episodic increases in atmospheric oxygen content.’
      • ‘The effects of UV on microorganisms growing under conditions prevalent during the early Precambrian Aeon are examined.’
      • ‘The record has been much deformed, reconstituted, and obliterated during the subsequent Proterozoic and Phanerozoic eons.’
      • ‘The rocks dated back into the Archean eon, before 2.5 billion years ago.’
      • ‘These creatures were direct descendants of the great dinosaurs of the long past Mesozoic Aeon.’
  • 2Philosophy
    (in Neoplatonism, Platonism, and Gnosticism) a power existing from eternity; an emanation or phase of the supreme deity.

    • ‘This aeon is the image of the eternal age of the next life.’
    • ‘The proposition that randomness is equal to the Platonic Aeon is not explained.’
    • ‘Freedom did not exist before history (in some Gnostic aeon of perfection), but actualizes itself in a passage through time.’
    • ‘He goes on to note that all aeons emanate from it.’
    • ‘Whether that master be regarded as a sage or as a Gnostic aeon, the orthodox view of him would be seriously challenged.’


Mid 17th century: via ecclesiastical Latin from Greek aiōn ‘age’.