(of an event) important, momentous.

A particular period of history, or of a person's life, especially one considered noteworthy or remarkable. / A notable event which marks the beginning of such a period.

(sciences, transitive) To divide (data) into segments by time period.

Moment of theoretical suspension of all action. / Moment of theoretical suspension of disbelief.

plural of epoch

Of or pertaining to an epoch. / (figuratively) Highly important or significant; monumental, epoch-making.

In an epochal manner.

simple past tense and past participle of epoch

present participle of epoch

plural of epoche