Era definition

îrə, ĕrə
An event or date that marks the beginning of a new or important period in the history of something.
noun
33
10
A period of time characterized by particular circumstances, events, or personages.

The Colonial era of US history; the Reagan era.

noun
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7
The longest division of geologic time, made up of one or more periods.
noun
18
6
A division of geologic time , longer than a period and shorter than an eon.
8
2
Earned run average.
abbreviation
14
11
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A period of time as reckoned from a specific date serving as the basis of its chronological system.
noun
4
3
(baseball) Earned run average.
abbreviation
2
2
The definition of an era is a period of time in history that is unified by cultural or historical factors.

An example of an era is the industrial era.

noun
1
1
Equal Rights Amendment.
abbreviation
1
2
A time period of indeterminate length, generally more than one year.
noun
1
2
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(geology) A unit of time, smaller than aeons and greater than periods.
noun
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2
A system of reckoning time by numbering the years from some important occurrence or given point of time.

The Christian Era.

noun
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3
A period of time measured from some important occurrence or date.
noun
0
2
(geol.) A subdivision of an eon.
noun
0
2
Equal Rights Amendment.
abbreviation
0
2
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A period of time considered in terms of noteworthy and characteristic events, developments, individuals, etc.

An era of progress.

noun
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3

Other Word Forms

Noun

Singular:
era
Plural:
eras

Origin of era

  • Late Latin aera from Latin counters pl. of aes aer- bronze coin ayes- in Indo-European roots

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

  • From Late Latin aera.

    From Wiktionary