- a standard paper size, 297 × 420 mm
- (as adjective)an A3 book
- text messaging anytime, anywhere, anyplace
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
Examples from the Web for a3
A3: We have the responsibility to be kind to one another, and that responsibility extends to celebrities, too.Justin Bieber's Spiritual Crisis
January 26, 2014
A2 seemed the most promising, but A3 could also have potential, so I would carry these two options on to the next level.A Mathematically Impossible Novel: Manil Suri Explains “The City of Devi”
March 15, 2013
Witness Kate Middleton, who drives the most boringly middle class car in Britain—a German-made Audi A3.Prince Harry's Vegas Harley Adventure
November 21, 2011
As Bleckner put it to The Daily Beast, A3 is a study in “luxury, tragedy, and beauty.”
On one hand, A3 illustrates the timelessness of the brand over nearly three decades.Thirty Years of Tiffany Ads
July 27, 2011
Let A1, A2, A3 etc. be moments of α in the order of their occurrences.The Concept of Nature
Alfred North Whitehead
Let us next examine the seventh glyph or term from the bottom (A3) and see how it is formed.
The cycle is very clearly recorded in A3, the clasped hand being of a particularly realistic form.
Passing over the cycle coefficient in A3 for the present, it is clear that the katun coefficient in A4 is 19.
In A3, however, shorter theses are met with along with the usual resolutions: a monosyllabic thesis in hwr se oden El.A History of English Versification