era

noun

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.”

   “In an era when political leaders promise deliverance from decline through America’s purported preeminence in scientific research, the news that science is in deep trouble in the United States has been as unwelcome as a diagnosis of leukemia following the loss of health insurance.”

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.
4. (abbreviation, alt-of, 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.)
5. (abbreviation, alt-of, 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.”

6. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of electrically reconfigurable array.
7. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of explosive reactive armor.
8. (UK, abbreviation, alt-of, countable, initialism, uncountable)Initialism of engine room artificer, a Royal Navy position.

name

1. (European-Union, abbreviation, alt-of, initialism)Initialism of European Railway Agency, called today the European Union Agency for Railways.
2. (US, abbreviation, alt-of, 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.”

   “This Article argues that Congress can recognize the ERA as part of the Constitution despite the expiration of the ratification deadline in 1982. But Congress should not do so until there is no doubt that thirty-eight states have ratified the ERA.”

3. (abbreviation, alt-of, initialism)Initialism of Employment Rights Act.