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epoch-making

American

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

adjective

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

an epoch-making discovery.

epoch-making British

adjective

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.

"It was an earth-shattering result and it was an epoch-making one as well," said former Plaid leader Dafydd Wigley.

From BBC • Aug. 5, 2025

"ChatGPT is an epoch-making application ... It can draw conclusions from a complicated network of relationships with numerous dimensions in ways human brains cannot," said Steve Chen, partner of Shanghai-based MX Capital.

From Reuters • Jun. 5, 2023

The Beatles' influence continues to reverberate across the decades since their epoch-making emergence in global culture.

From Salon • Mar. 18, 2023

“It will be an epoch-making milestone in the history of China-Arab relations.”

From New York Times • Dec. 8, 2022

This was one of the truly epoch-making achievements of human history.

From "History of Art, Volume 1" by H.W. Janson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023