A3

¹ British

noun

See also A sizes
1. a standard paper size, 297 × 420 mm
2. ( as adjective )
  
  an A3 book

"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

A3 ² British

abbreviation

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

Example Sentences

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The 62-year-old was the driver of a Ford Puma which collided with an Audi A3 on the A439 Warwick Road near Stratford-upon-Avon in Warwickshire on Monday.

From BBC ● Aug. 30, 2026

Spain topped the League A3 group thanks to a better head-to-head record against England, who finished runners-up.

From BBC ● Jun. 9, 2026

The company launched the Xuanji A3 chip, a 4 nanometer semiconductor for autonomous driving, late Thursday at its technology day in Shenzhen, China.

From The Wall Street Journal ● May 29, 2026

The facility received an A3 rating from Moody’s, marking the first time a loan backed by high-performance computing infrastructure has achieved investment-grade status.

From Barron's ● Apr. 2, 2026

Equation 19 fixed the longitude position of the satellite at time T. Equation A3 accounted for errors in longitude.

From "Hidden Figures" by Margot Lee Shetterly

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