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Showing results for au. Search instead for AAUG.

au

1 American  
[oh] / oʊ /
French.

plural

aux

  1. to the; at the; with the.

Au 2 American  

abbreviation

  1. author. Also au

Au 3 American  
Symbol, Chemistry.

  1. gold.

AU 4 American  

abbreviation

  1. astronomical unit.

A.U. 5 American  
Or a.u.

abbreviation

  1. angstrom unit.

Au 1 British  

symbol

  1. 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

  1. African Union

  2. Also: a.u..  angstrom unit

  3. 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

  1. 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  

  1. Abbreviation of astronomical unit

Etymology

Origin of Au

From the Latin word aurum

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

I snagged a pain au chocolat for the flight.

From The Wall Street Journal • Mar. 18, 2026

Variety described it as "dutiful fan service, sure to satisfy legions of cultists cosplaying in tweed, but not unapproachable to viewers who aren't entirely au fait with the show".

From BBC • Mar. 5, 2026

It’s exactly what it sounds like: toasted French or Italian bread soaked in the rich, savory au jus of an Italian beef sandwich.

From Salon • Dec. 7, 2025

Towers of onion rings stacked high, bone-in rib-eyes, bubbling pots of lobster mac and cheese, fries and meats drowning in au poivre.

From Los Angeles Times • Oct. 31, 2025

“What happens if the au pair does not go to another host family?”

From "Silent To The Bone" by E.L. Konigsburg

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.