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A4

British  

noun

  1. See also A sizes

    1. a standard paper size, 210 × 297 mm

    2. ( as adjective )

      an A4 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

Example Sentences

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He decided to sell his nearly 10-year-old royal blue Audi A4 for $13,000 a few months before its COE expires in December to recoup at least some residual value.

From The Wall Street Journal Aug. 28, 2026

He often made notes, scribbling in an A4 hardback notebook, and sometimes shook his head at parts of their testimony.

From BBC Jun. 22, 2026

A4 chips that drew too much power weren’t well-suited for smartphones running on a battery, but worked just fine in the Apple TV plugged into an outlet, said people familiar with the products.

From The Wall Street Journal May 18, 2026

For comparison, the thickness-to-size ratio of this layer is about one to a million, while a typical A4 sheet of paper has a ratio closer to 1:2000.

From Science Daily Apr. 5, 2026

He'd stuck a Post-it on the front with a simple message—Plant this!—and the initial A4 hastily scrawled in the corner.

From "City of the Plague God" by Sarwat Chadda

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