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epoch-making

American  
[ep-uhk-mey-king, ee-pok-] / ˈɛp əkˌmeɪ kɪŋ, ˈi pɒk- /

adjective

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

    an epoch-making discovery.


epoch-making British  

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

Etymology

Origin of epoch-making

First recorded in 1870–75

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The new fossils date to 17 to 19 million years ago, or the early-mid Miocene epoch, making them the youngest known toothed whales.

From Science Magazine • Feb. 17, 2013

I don’t imagine his appearances in “T. J. Hooker,” “The Practice” or “Boston Legal” were similarly epoch making.

From New York Times • Feb. 17, 2012

You know I never dwell much upon attire, but it is sometimes necessary when it is in a way epoch making.

From People of the Whirlpool by Wright, Mabel Osgood

The thirty-sixth session of Chautauqua was epoch making in the development of material resources.

From The Story of Chautauqua by Hurlbut, Jesse Lyman

In 1832 he raised the whole issue in the "epoch making" sermon, in which he advanced the view of the communion service that led to his resignation of the Christian ministry.

From Transcendentalism in New England A History by Frothingham, Octavius Brooks

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