Meaning of epoch-making

ep•och-mak•ing

Pronunciation: (ep'uk-mā"king or, esp. Brit., ē'pok-), [key]
— adj.
  1. opening a new era, as in human history, thought, or knowledge; epochal: an epoch-making discovery.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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