epoch-making

[ep-uh k-mey-king or, esp. British, ee-pok-]

adjective

opening a new era, as in human history, thought, or knowledge; epochal: an epoch-making discovery.

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 of epoch-making

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.
The Martin Luther King, Jr. Day, 1995, Memorial Issue
Various

British Dictionary definitions for epoch-making

epoch-making

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