Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “A4”

A4

noun [U]     /ˌeɪˈfɔːr/ US  /-ˈfɔːr/
paper that is a standard size of 21 centimetres by 29.7 centimetres: a sheet of A4 A4 paperPaper Area, mass, weight and volume in general
(Definition of A4 noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of A4

Definitions of “A4” in other dictionaries

Word of the Day

well in (with)

to have a good relationship with someone in which they like you and from which you get an advantage

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More