[ 'i:pɒk , 'ɛpɒk ]
■ noun a particular period of time in history.
↘the beginning of a period in the history of someone or something.
↘ Geology a division of time that is a subdivision of a period and is itself subdivided into ages, corresponding to a series.
↘ Astronomy an arbitrarily fixed date relative to which planetary or stellar measurements are expressed.
Derivatives
~al adjective
Origin
C17 (in the L. form ~a ): from mod. L. ~a , from Gk epokhē 'stoppage, fixed point of time', from epekhein 'stop, take up a position'.