Meaning of “A3” in the English Dictionary

british dictionary

"A3" in British English

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A3noun [ U ]

uk /ˌeɪˈθriː/ us /ˌeɪˈθriː/

in the UK, paper that is a standard size of 29.7 centimetres by 42 centimetres:

a sheet of A3
A3 paper

(Definition of “A3” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"A3" in Business English

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A3noun [ U ]

uk us

MEASURES, WORKPLACE a standard international paper size, measuring 297mm × 420mm

(Definition of “A3” from the Cambridge Business English Dictionary © Cambridge University Press)