Top definition
AU simply means alternate universe in fan fiction forums. You take a famous person and make them unfamous, make them "normal."
In this story, Elvis never sang and he became a chef.
by Rayenna September 25, 2003
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Jul 1 Word of the Day
sending two texts in a row without a reply inbetween.
Rachel: whats up?
Tessa: not to much! hbu?
Tessa: dude, i'm so bored.
Rachel: stop double texting me.
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2
A fanfiction term meaning Alternate Universe.

An AU fic is a fanfic which includes elements of a book which are completely unfeasible.
That Harry Potter fic where his parents were still alive was totally an AU.
by Lexy C. November 13, 2007
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3
A alternate universe, based off the game, but basically changed in some way.
Do you know what a AU is? A alternate universe, based off the game, but basically changed in some way.
by TeamPaydayTypicalColors2 January 11, 2017
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4
The astronomical unit (AU or au or a.u. or rarely ua) is a unit of distance, approximately equal to the mean distance between Earth and Sun. The currently accepted value of the AU is 149,597,870,691 ± 30 metres (about 150 million kilometres or 93 million miles).
That star is x AU's away from Earth.
by Maverician March 24, 2005
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6
'Au' is also a Finnish word and it means the same as 'ouch' in English.
A: Viilsin vahingossa sormeni auki. (I accidentally slit my finger open.)
B: Au. (Ouch.)
by sirggu June 28, 2006
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