A4

British

noun

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.

See Examples For:

Everyone heading into the arena is limited to one bag, no bigger than A4 in size, and people should expect security searches.

From BBC ● Jun. 10, 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

Investigator Linda Comstive looked through 39,666 exchanges in the WhatsApp group from between 2019 and 2022, which when printed came out as 1,250 sheets of A4 paper.

From BBC ● Jan. 28, 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

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