[ep-uh-kuhl or, esp. British, ee-po-]
of, pertaining to, or of the nature of an epoch.
extremely important, significant, or influential.

1675–85; epoch + -al1

epochally, adverb
nonepochal, adjective
preepochal, adjective
unepochal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To Epochal
World English Dictionary
epoch (ˈiːpɒk)
1.  a point in time beginning a new or distinctive period: the invention of nuclear weapons marked an epoch in the history of warfare
2.  a long period of time marked by some predominant or typical characteristic; era
3.  astronomy a precise date to which information, such as coordinates, relating to a celestial body is referred
4.  geology a unit of geological time within a period during which a series of rocks is formed: the Pleistocene epoch
5.  physics the displacement of an oscillating or vibrating body at zero time
[C17: from New Latin epocha, from Greek epokhē cessation; related to ekhein to hold, have]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
The impact of this epochal shift will be as strong on universities and their
  students as on society as a whole.
As those who had planned it had hoped, his capture was to prove an epochal
  event-but in ways they had not envisaged.
Others explain it as the result of epochal social change and the loss of moral
  ballast once supplied by communist ideology.
To see why, consider another epochal shift in the development of a rising
  economic power.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature