English dictionary



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English noun: epoch

1. epoch (time) a period marked by distinctive character or reckoned from a fixed point or event


Synonymsera


Broader (hypernym)period, period of time, time period


Narrower (hyponym)age, day, historic period, modern era


Instance hyponymCaliphate, Christian era, Common era

2. epoch (time) (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded


Synonymsdate of reference


Broader (hypernym)date


Domain categoryastronomy, uranology

3. epoch (time) a unit of geological time that is a subdivision of a period and is itself divided into ages


Broader (hypernym)geologic time, geological time


Instance hyponymEocene, Eocene epoch, Glacial epoch, Holocene, Holocene epoch, Miocene, Miocene epoch, Oligocene, Oligocene epoch, Paleocene, Paleocene epoch, Pleistocene, Pleistocene epoch, Pliocene, Pliocene epoch, Recent, Recent epoch


Part meronymgeological period, period









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