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epochal (ˈepˌɒkəl) 

Definitions

adjective

  1. of great importance; momentous
  2. of or relating to a point in time beginning a new or distinctive period

epoch (ˈiːpɒk Pronunciation for epoch

Definitions

noun

  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

Derived Forms

epochal (ˈɛpˌɒkəl Pronunciation for epochal  adjective
ˈepˌochally adverb

Word Origin

C17: from New Latin epocha, from Greek epokhē cessation; related to ekhein to hold, have

Example Sentences Including 'epochal'

In 1932 MoMA introduced the US to the International Style with Johnson's epochal exhibition Modern Architecture.
Times, Sunday Times (2005)
That is why the terrible events of 11 September have been endowed with such epochal significance.
Spiked
The Aboriginals see epochal struggles and mythical personae in what to us are just hills and rocks.
Times, Sunday Times (2004)
This epochal , astonishing and disturbing year turned out to be anything but peaceful in Europe and America.
Hebblethwaite, Peter Paul VI - The First Modern Pope
What they seem not fully to understand is that these epochal wars were fought over competing ideologies.
Globe and Mail (2003)

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