epoch

noun

ep·​och ˈe-pək How to pronounce epoch (audio)
ˈe-ˌpäk,
US also and British usually
ˈē-ˌpäk How to pronounce epoch (audio)
1
a
: an event or a time marked by an event that begins a new period or development
b
: a memorable event or date
2
a
: an extended period of time usually characterized by a distinctive development or by a memorable series of events
b
: a division of geologic time less than a period and greater than an age
3
: an instant of time or a date selected as a point of reference (as in astronomy)

Did you know?

Epoch comes to us, via Medieval Latin, from Greek epochē, meaning "cessation" or "fixed point." "Epochē," in turn, comes from the Greek verb epechein, meaning "to pause" or "to hold back." When "epoch" was first borrowed into English, it referred to the fixed point used to mark the beginning of a system of chronology. That sense is now obsolete, but today "epoch" is used in some fields (such as astronomy) with the meaning "an instant of time or a date selected as a point of reference." The "an event or a time that begins a new period or development" sense first appeared in print in the early 17th century, and "epoch" has been applied to defining moments or periods of time ever since.

Choose the Right Synonym for epoch

period, epoch, era, age mean a division of time.

period may designate an extent of time of any length.

periods of economic prosperity

epoch applies to a period begun or set off by some significant or striking quality, change, or series of events.

the steam engine marked a new epoch in industry

era suggests a period of history marked by a new or distinct order of things.

the era of global communications

age is used frequently of a fairly definite period dominated by a prominent figure or feature.

the age of Samuel Johnson

Examples of epoch in a Sentence

The Civil War era was an epoch in 19th-century U.S. history. The development of the steam engine marked an important epoch in the history of industry.
Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
During the epoch starting in 2032, more than 99% of the bitcoin supply will have been issued. Liam Wright, Forbes, 30 Sep. 2024 If our explorations of the strange frontiers of solid-state physics are successful, there is always a chance that the next epoch of technology will come to be known as the Strange Metal Age. Douglas Natelson, Scientific American, 19 Mar. 2024 Interestingly, Puerto Rican painting went largely unchanged through that epoch. Chadd Scott, Forbes, 29 Sep. 2024 Within that epoch there was also a 40 million year span known as the Ordovician Impact Spike that saw the Earth fairly tattooed with meteors raining down from space. Jeffrey Kluger, TIME, 18 Sep. 2024 See all Example Sentences for epoch 

Word History

Etymology

Medieval Latin epocha, from Greek epochē cessation, fixed point, from epechein to pause, hold back, from epi- + echein to hold — more at scheme entry 1

First Known Use

1614, in the meaning defined at sense 1a

Time Traveler
The first known use of epoch was in 1614

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Dictionary Entries Near epoch

Cite this Entry

“Epoch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epoch. Accessed 12 Nov. 2024.

Kids Definition

epoch

noun
ep·​och ˈep-ək How to pronounce epoch (audio) -ˌäk How to pronounce epoch (audio)
 also  ˈē-ˌpäk
1
: an event or a time that begins a new period of development
2
: a memorable event, date, or period
3
: a division of geologic time less than a period and greater than an age
epochal
-əl
adjective
epochally
-ə-lē
adverb

More from Merriam-Webster on epoch

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