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1.
AU
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
1356 115
 
2.
AU
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
415 67
 
3.
AU
"AU" - the symbol for gold on the Periodical Table of Elements
A valuable metal with a yellowish color
by Thou-Who-Shall-Not-Be-Named July 27, 2005
310 171
 
4.
AU
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
128 72
 
5.
au
'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
88 71
 
6.
AU
Audio Unit.
A apple machintosh music software plugin format. It's called AU.
by Zelidon June 02, 2013
5 7
 
7.
au
a sound made by those of island decent
au bro.
au i smasha your face
by Gamgetta December 19, 2004
41 48