Definition of epoch Epoch
/ɛˈpʌk/ - [epuk] - ep•och
We found 19 definitions of epoch from 8 different sources.
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What does epoch mean?
WordNet
NounPlural: epoches |
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| epoch - a unit of geological time that is a subdivision of a period and is itself divided into ages | ||
| geologic time, geological time the time of the physical formation and development of the earth (especially prior to human history) | ||
| geological period, period a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations; "in England they call a period a stop" | ||
| epoch - (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded | ||
| date of reference | ||
| date sweet edible fruit of the date palm with a single long woody seed | ||
| epoch - a period marked by distinctive character or reckoned from a fixed point or event | ||
| era | ||
| period of time, time period, period an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period" | ||
| day United States writer best known for his autobiographical works (1874-1935) | ||
| historic period, age an era of history having some distinctive feature; "we live in a litigious age" | ||
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Wiktionary 
- epoch (Noun)
A particular period of history, especially one considered remarkable or noteworthy. - epoch (Noun)
A notable event which marks the beginning of such a period. - epoch (Noun)
A precise instant of time that is used as a reference point. - epoch (Noun)
A precise instant of time that is used as a reference point e. g. January 1, 1970, 0000 UTC.
Webster DictionaryWebster's Unabridged Dictionary 📘
- epoch (n.)
A fixed point of time, established in history by the occurrence of some grand or remarkable event; a point of time marked by an event of great subsequent influence; as, the epoch of the creation; the birth of Christ was the epoch which gave rise to the Christian era. - epoch (n.)
A period of time, longer or shorter, remarkable for events of great subsequent influence; a memorable period; as, the epoch of maritime discovery, or of the Reformation. - epoch (n.)
A division of time characterized by the prevalence of similar conditions of the earth; commonly a minor division or part of a period. - epoch (n.)
The date at which a planet or comet has a longitude or position. - epoch (n.)
An arbitrary fixed date, for which the elements used in computing the place of a planet, or other heavenly body, at any other date, are given; as, the epoch of Mars; lunar elements for the epoch March 1st, 1860.
OmegaWiki DictionaryOmegaWiki Dictionary Ω
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epoch
A period of time in history seen as a single coherent entity. -
epoch
A designated instant in time. -
epoch
Moment in history which is usually marked by some significant event.
Chambers DictionaryChamber's 20th Century Dictionary 📕
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epoch
ep′ok, or ē′-, n. a point of time fixed or made remarkable by some great event from which dates are reckoned: a period remarkable for important events: (astron.) the mean heliocentric longitude of a planet in its orbit at any given time.—adjs. Ep′ochal; Ep′och-mā′king.—Make, Mark, an epoch, to begin an important era. [Gr. epochē—epechein, to stop—epi, upon, echein, to hold.]
Sailor's Word-BookThe Sailor's Word-Book ⛵
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epoch
The time to which certain given numbers or quantities apply.
Wikipedia 
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astronomy
In astronomy, an epoch (or sometimes epochal moment) is a moment in time for which the position or the orbital elements of a celestial body are specified.
The position at other times can be measured by taking into account proper motion or orbital motion. In the case of orbital elements for a solar system body, these change due to perturbation by other bodies on our solar system.
Part of speech
🔤- epoch, noun, singular of epochs.
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