• synonyms


[ep-uh k-mey-king or, esp. British, ee-pok-]
  1. opening a new era, as in human history, thought, or knowledge; epochal: an epoch-making discovery.
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Origin of epoch-making

First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for epoch-making

Historical Examples

  • The marriage feast was indeed an epoch-making event in the county.

    They of the High Trails

    Hamlin Garland

  • And now a word as to the personality of the author of this epoch-making statement.

    Danger! and Other Stories

    Arthur Conan Doyle

  • There lies my attitudinizor, which may well become an epoch-making device.

    The Point of View

    Stanley Grauman Weinbaum

  • Priestley's discovery of oxygen was epoch-making, but does not represent all that he did.

    Priestley in America

    Edgar F. Smith

  • If we can discover this, we shall have the secret of this epoch-making novel.

British Dictionary definitions for epoch-making


  1. of great importance; momentous
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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