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au

1 American  
[oh] / oʊ /
French.
  • aux
    plural
  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  

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 2 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 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.

See Examples For:

They made off with a portrait titled "Madame Colonna Romano" and the depiction of a woman at a well called "Jeune femme au puits", his office said.

From Barron's Sep. 8, 2026

It’s important to remember that it was 1976, so this particular fashion choice was not yet au courant, because they had just codified it.

From Salon Aug. 10, 2026

They just put the most amazing thing on their menu; a steak frites with masala au poivre.

From Los Angeles Times Aug. 7, 2026

If SGA’s interviews were edgier, if his game were a little more noisy, if his sneakers were more au courant than good ol’ Converse…it might be different.

From The Wall Street Journal May 18, 2026

“Coq au vin. I haven’t made it before. I just found out that you’re supposed to cook it twenty- four hours in advance. I’m afraid I’m running a bit behind.”

From "The Namesake" by Jhumpa Lahiri

Speaking last year, Morgan said: "If you asked a 25-year-old target market consumer in America, would they know Au? Probably not yet," he said.

From BBC Aug. 17, 2026

The findings were published in ACS Environmental Au.

From Science Daily Apr. 11, 2026

Au Vodka co-owner, Charlie Morgan said the gig was "really last minute but almost every member of their staff was there", as well as friends, family and local influencers.

From BBC Feb. 24, 2026

He said Regencell’s chief executive, Yat-Gai Au, “firmly believes that the company’s shares have consistently been a target of short selling from our IPO to present.”

From The Wall Street Journal Jan. 27, 2026

In Haiti, we used to travel to the top of the mountain ranges near Au Cap for their cool winds.

From "American Street" by Ibi Zoboi

A male Montagu's harrier, known as "AU" by conservationists, bred with two different females, rearing six chicks across two nests on English farmland.

From BBC Aug. 24, 2026

AngloGold Ashanti AU 1.65%increase; green up pointing triangle said higher gold prices helped deliver a jump in quarterly earnings, with record free cash flow enabling an up to $2 billion share buyback and higher dividend.

From The Wall Street Journal May 8, 2026

That’s because the East Region will be held in Washington, where AU is located.

From Los Angeles Times Mar. 20, 2026

"The AU has helped de-escalate political tensions and support dialogue before situations descend into violence," he said, citing the work done to prevent war between Sudan and South Sudan over the flashpoint region of Abyei.

From Barron's Feb. 13, 2026

The basic unit of measure in the solar system is the Astronomical Unit, or AU, representing the distance from the Sun to the Earth.

From "A Short History of Nearly Everything" by Bill Bryson

In addition to the Global Reparation Fund, which will be championed by a committee of experts set up by the A.U.

From Seattle Times Nov. 16, 2023

But despite a public invitation earlier this month for the two sides to meet in South Africa, the A.U. appears to have made few logistical or diplomatic preparations for talks, diplomats said.

From Washington Post Oct. 17, 2022

A.U. helicopters helped the soldiers hold the camp, they said.

From Washington Post May 3, 2022

For Tianna Hawkins, a 6-foot-3 forward who won a championship with the Washington Mystics in 2019, A.U. has allowed her to rediscover the joy of playing.

From New York Times Feb. 23, 2022

“It was almost totally A.U. nine,” Ekman said.

From "Blink" by Malcolm Gladwell

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