Era
Pertaining to the game of baseball, ERA (Earned Run Average) is a statistical measure of the effectiveness of a pitcher. It is computed by the following formula:

ERA = (earned runs allowed)*(9)/(innings pitched)

Obviously, the lower the ERA, the more effective the pitcher, with an ERA of around 1.50 or below being considered excellent.
If Tim Hudson, starting pitcher for the Atlanta Braves, pitches 38 innings spread out over the first 6 games of the season, and allows 4 earned runs during those games, his ERA would be (4*9)/38 or 0.95. Thus he would be seen to be an extremely effective pitcher.
by Fox Horn May 05, 2005

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ERA
funny Jewish girls who suffer from limited food freedom and rabbit fetish. They have a tendency to want to become a pokemon, usually the Jigglypuff.
Poor Erica, her grandmother tempted her with too much food again. Her bathroom became her room!

She's an ERA huh?
by DragonKnightAcer November 18, 2010

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Era
Era or "Error": A white rapper with no talent, who over-zealously proclaims their greatness, and takes credit for their older brother's accomplishments.
Era was on stage in Tiffin, Ohio, pretending to be a hard-core rapper in front of a sea of white people. Pretty hard-core.
by Say it like it is... June 01, 2011

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Era
Only dressing in black, white and gray. Started by the punk band No One Goes Home.
Look at that kid who's dressed Era.
by Cruton November 04, 2007

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A totally fucking awesome name!
Eras?! is that like fucking awesomenese?
by Eras Longras January 25, 2009

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era
the one DDR song that i look really weird playing since the steps are so fast and all.
every other song i play is so smooth with my steps... like Burning the Floor.
A:era (nostalmix) is amazing. i played it the other day and im hooked.

B:you look so... unsmooth doing it.

A: oh well. its fast, and i can do it.
by The Irishman of DOOM May 15, 2004

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Era
A playerworld server on the game Graal.
Graals Webpage is www.graalonline.com
I play Era
by Anonymous August 29, 2003

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Era
word always used in conjunction with woot.
era era woot era woot woot era?
by woot? August 04, 2003

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