Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun epoch

3 senses of epoch

Sense 1
era, epoch -- (a period marked by distinctive character or reckoned from a fixed point or event)
       => time period, period of time, period -- (an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period")

Sense 2
epoch, date of reference -- ((astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded)
       => date -- (the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred; "he tried to memorizes all the dates for his history class")

Sense 3
epoch -- (a unit of geological time that is a subdivision of a period and is itself divided into ages)
       => geological time, geologic time -- (the time of the physical formation and development of the earth (especially prior to human history))