Epoch definition

ĕpək, ēpŏk
Frequency:
A particular period of history, especially one considered remarkable or noteworthy.
noun
29
9
The beginning of a new and important period in the history of anything.

The first earth satellite marked a new epoch in the study of the universe.

noun
15
3
A period of time considered in terms of noteworthy and characteristic events, developments, persons, etc.

An epoch of social revolution.

noun
9
3
(astron.) The time at which observations are made, as of the positions of planets or stars.
noun
7
2
A unit of geologic time that is a division of a period.
noun
6
2
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The shortest division of geologic time . An epoch is a subdivision of a period.
3
0
A subdivision of a period in geologic time corresponding to the rock strata of a series.
noun
2
1
A particular period of history, especially one considered remarkable or noteworthy.
noun
1
0
(computing, uncountable) A precise instant of time that is used as a reference point (e.g. January 1, 1970, 00:00:00 UTC).
noun
1
1
A notable event which marks the beginning of such a period.
noun
0
0
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(astronomy) A precise instant of time that is used as a reference point.
noun
0
0
A point in time or a precise date.
noun
4
5
Epoch is defined as an important period in history or an era.

An example of an epoch is the adolescent years.

An examplf of an epoch is the Victorian era.

noun
0
1
(astronomy) An instant in time that is arbitrarily selected as a point of reference for specification of celestial coordinates.
noun
0
1

Other Word Forms

Noun

Singular:
epoch
Plural:
epochs

Origin of epoch

  • Medieval Latin epocha measure of time from Greek epokhē a point in time segh- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Medieval Latin epocha, from Ancient Greek ἐποχή (epokhē, “a check, cessation, stop, pause, epoch of a star, e.g., the point at which it seems to halt after reaching the highest, and generally the place of a star; hence, a historical epoch”), from ἐπέχειν (epechein, “to hold in, check”), from ἐπί (épí, “upon”) + ἔχειν (echein, “to have, hold”).

    From Wiktionary