A5

British

noun

See also A sizes
1. a standard paper size (half A4), 148 × 210 mm
2. ( as adjective )
  
  A5 notepaper

"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.

Motorists are being diverted off the M1 to the A505 onto the A5 through Dunstable.

From BBC • Apr. 3, 2026

Money from the fund was also earmarked to go towards stalled projects like the A5 road and Casement Park stadium.

From BBC • Feb. 1, 2026

It comes pre-trimmed so you can go straight from fridge to smoker, and the A5 marbling is extraordinary.

From Salon • Dec. 4, 2025

The Irish government hopes the air service will improve connectivity to the north west of the island while the A5 corridor is being worked on.

From BBC • Nov. 18, 2025

If I call you on my digital mobile, our conversation will be encrypted with the A5 encryption algorithm between the mobile phone and the exchange.

From Underground by Dreyfus, Suelette

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