noun A particular period of history, or of a person's life, especially one considered noteworthy or remarkable.
noun A notable event which marks the beginning of such a period.
noun A specific instant in time, chosen as the point of reference or zero value of a system that involves identifying instants of time.
UNIX epoch; J2000 epoch
noun A geochronologic unit of hundreds of thousands to millions of years; a subdivision of a period, and subdivided into ages (or sometimes subepochs).
noun One complete presentation of the training data set to an iterative machine learning algorithm.
The neural network was trained over 500 epochs.
verb To divide (data) into segments by time period.