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The definition of epoch

5 Definitions of: epoch

    1. noun, a point in time beginning a new or distinctive period
    2. noun, a long period of time marked by some predominant or typical characteristic; era
    3. noun, astronomy a precise date to which information, such as coordinates, relating to a celestial body is referred
    4. noun, geology a unit of geological time within a period during which a series of rocks is formed
    5. noun, physics the displacement of an oscillating or vibrating body at zero time
    6. Show me some examples of this word: epoch
    7. Show me the etymology of the word: epoch
Synonyms: time, date, era, age, period, aeon
 

From Collins

©HarperCollins 2008. Collins English Dictionary definition of epoch