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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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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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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 Β± 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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'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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Abbreviation for American University, A school of highly affluent, overly intellectual, and often-times pretentious students. It is not uncommon to be sitting in an AU classroom and have a prince, the daughter of a Fortune 500 CEO, and an ambassador's son within a 4-foot radius.
American University is world-renowned for its top-rated School of International Studies.
by AU Student December 15, 2003
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