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say it: EP-uh-kuhl
epochal is an adjective meaning "highly significant or important especially bringing about or marking the beginning of a new development or era". It carries one recorded sense.
highly significant or important especially bringing about or marking the beginning of a new development or era
“epochal decisions made by Roosevelt and Churchill”
“an epoch-making discovery”
Definitions, synonyms and semantic relations for epochal come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.