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

     

    epoch

     noun
    noun
    BrE BrE//ˈiːpɒk//
     
    ; NAmE NAmE//ˈepək//
     
    (formal or literary)
     
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  1. 1a period of time in history, especially one during which important events or changes happen synonym era The death of the emperor marked the end of an epoch in the country's history.
  2. 2 (geology) a length of time which is a division of a period. geological epochs
  3. Word Origin early 17th cent. (in the Latin form epocha; originally in the general sense of ‘a date from which succeeding years are numbered’): from modern Latin epocha, from Greek epokhē ‘stoppage, fixed point of time’, from epekhein ‘stop, take up a position’, from epi ‘upon, near to’ + ekhein ‘stay, be in a certain state’.Extra examples Welfare reform was an epoch in the history of US social policy. an epoch of great social change the importance of the computer in the present epoch The death of the emperor marked the end of an epoch in the country’s history.
See the Oxford Advanced American Dictionary entry: epoch

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