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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

Hadley built and equipped his flyer and started off on what he hoped would be an epoch making flight.

From Astounding Stories of Super-Science July 1930 by Bates, Harry

The welcome she had received as a guest in his house and the wonderful evening that succeeded it were among the epoch making hours in Eleanor’s life.

From Turn About Eleanor by Cootes, F. Graham

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

From The Story of Chautauqua by Hurlbut, Jesse Lyman

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