era

noun eras · aera · æra

1. A time period of indeterminate length, generally more than one year. Even in an era when individuality in dress is a cult, his clothes were noticeable. He was wearing a hard hat of the low round kind favoured by hunting men, and with it a black duffle-coat lined with white.
2. A geochronologic unit of tens to hundreds of millions of years; a subdivision of an eon, and subdivided into periods.
3. informal An indefinite period of time in one’s life characterized by a particular interest.

Similar: age, epoch, period, cycle, day, era, generation, Great Year, interval, Platonic year, time

noun ERAs

1. abbreviation, countable, initialism, uncountable Initialism of Earth rotation angle (the rotation of the Earth from the Celestial Intermediate Origin that has no instantaneous motion along the equator.)
2. abbreviation, countable, initialism, uncountable Initialism of earned run average, a baseball statistic. Taylor, listed at 6-foot-3 and 230 pounds, went 0-1 with a 1.01 ERA in 15 games for Birmingham. He struck out 37 in 26 2/3 innings.
3. abbreviation, countable, initialism, uncountable Initialism of electrically reconfigurable array
4. abbreviation, countable, initialism, uncountable Initialism of explosive reactive armor
5. UK, abbreviation, countable, initialism, uncountable Initialism of engine room artificer, a Royal Navy position.

proper noun

1. European Union, abbreviation, initialism Initialism of European Railway Agency, called today the European Union Agency for Railways.
2. US, abbreviation, initialism Initialism of Equal Rights Amendment, a proposed amendment to the US Constitution. ERA meant the equality of women, to those who urgently sought it, to those who abhorred it, and to those who found it obvious if not entirely redundant.
3. abbreviation, initialism Initialism of Employment Rights Act