Definition of aeon noun from the Oxford Advanced Learner's Dictionary



    (British English) (also eon North American English, British English) noun
    BrE BrE//ˈiːən//
    ; NAmE NAmE//ˈiːən//
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  1. 1(formal) an extremely long period of time; thousands of years Only yesterday—and it seemed aeons ago, not just a few hours—he had been a happily married man.
  2. 2 (geology) a major division of time, divided into eras aeons of geological history These hills have been worn down over aeons of geological time.
  3. Word Originmid 17th cent.: via ecclesiastical Latin from Greek aiōn ‘age’.

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