A4

See also: a4 and A-4

English

Etymology 1

See the Wikipedia article ISO 216, the international standard on paper sizes.

Noun

A4 (uncountable)

A standard paper size, defined by ISO 216.
dimensions: 210 x 297 mm
- 2001, Eoin Colfer, Artemis Fowl, page 66:
  "There are preparations to be made for our guest's arrival," said Artemis, handing a typewritten sheet of A4 to Juliet.

See also

(A paper sizes): 2A0 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10

quarto

Etymology 2

Proper noun

A4

one in a series of alphanumerics used in many national road systems.
The A4, which runs from London to Bristol, used to be known as the Great West Road.
(Britain, rail transport) A4 class, a class of steam locomotive used on the London and North Eastern Railway.

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