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English definition of “epoch”

epoch

noun [C]     /ˈiː.pɒk/ US  /-pɑːk/ (plural epochs)
a long period of time, especially one in which there are new developments and great change: The president said that his country was moving into a new epoch which would be one of lasting peace.Long periods of time
(Definition of epoch noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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