au
[ oh ]
/ oʊ /
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plural aux [oh]. /oʊ/. French.
to the; at the; with the.
QUIZ
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Question 1 of 9
Which of the following nouns has an irregular plural form?
Compare à la.
Words nearby au
Other definitions for au (2 of 5)
Au1
abbreviation
author.Also au
Other definitions for au (3 of 5)
Au2
Symbol, Chemistry.
gold.
Origin of Au
2From the Latin word aurum
Other definitions for au (4 of 5)
Other definitions for au (5 of 5)
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
How to use au in a sentence
British Dictionary definitions for au (1 of 3)
au
the internet domain name for
Australia
British Dictionary definitions for au (2 of 3)
Au
the chemical symbol for
gold
Word Origin for Au
from New Latin aurum
British Dictionary definitions for au (3 of 3)
AU
abbreviation for
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
Medical definitions for au (1 of 2)
Au
The symbol for the elementgold
Medical definitions for au (2 of 2)
AU
abbr.
auris utraque (each ear)
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for au (1 of 2)
Au
The symbol for gold.
Scientific definitions for au (2 of 2)
AU
Abbreviation of astronomical unit
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.