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epoch-making

[ ep-uhk-mey-kingor, especially British, ee-pok- ]

adjective

  1. opening a new era, as in human history, thought, or knowledge; epochal:

    an epoch-making discovery.



epoch-making

adjective

  1. of great importance; momentous
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of epoch-making1

First recorded in 1870–75

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