au

¹ American

[oh] / oʊ /

French.

to the; at the; with the.

Au ² American

abbreviation

author. Also au

Au ³ American

Symbol, Chemistry.

gold.

AU ⁴ American

abbreviation

astronomical unit.

A.U. ⁵ American

Or a.u.

abbreviation

angstrom unit.

Au ¹ British

symbol

gold

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

AU ² British

abbreviation

African Union
Also: a.u.. angstrom unit
Also: a.u.. astronomical unit

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

au ³ British

abbreviation

Australia

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

AU Scientific

Abbreviation of astronomical unit

Etymology

Origin of Au

From the Latin word aurum

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023