Noun: a long and distinct period of history with a particular feature or characteristic.
The Gothic style of architecture was popular during the feudal era.
This telephone is from another era, you don’t see them anymore today, except in museums.
Merriam-Webster Online Dictionary
era (noun)1.
a) a fixed point in time from which a series of years is reckoned
b) a memorable or important date or event , especially one that begins a new period in the history of a person or thing
2.
a system of chronological notation computed from a given date as basis
3.
a) a period identified by some prominent figure or characteristic feature - the era of the horse and buggy
b) a stage in development (as of a person or thing)
c) a large division of geologic time usually shorter than an eon - Paleozoic era period
1.
earned run average
2.
Equal Rights Amendment