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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
 
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
 
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
 
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
 
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
 
6.
AU
Audio Unit.
A apple machintosh music software plugin format. It's called AU.
by Zelidon June 02, 2013
 
7.
au
a sound made by those of island decent
au bro.
au i smasha your face
by Gamgetta December 19, 2004