Definitions for

Overview of noun epoch

The noun epoch has 3 senses? (first 1 from tagged texts)
1. (5) era, epoch

(a period marked by distinctive character or reckoned from a fixed point or event)

2. epoch, date of reference

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

3. epoch

(a unit of geological time that is a subdivision of a period and is itself divided into ages) © 2001-2013, Demand Media, all rights reserved. The database is based on Word Net a lexical database for the English language. see disclaimer
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