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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

But Donio isn’t giving up his 2020 Audi A4, which he enjoys despite it having the feature he despises.

From The Wall Street Journal • Apr. 3, 2026

More than 2 terabytes of data could fit within the area of a single A4 sheet of paper using this approach.

From Science Daily • Mar. 29, 2026

The history of A4 dates back to 2017, when 79% of Fresno Unified’s Black students failed to meet California’s reading standards, and 86% failed to reach math proficiency, according to the state’s assessment results.

From Los Angeles Times • Nov. 29, 2025

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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