Definition from Wiktionary, the free dictionary
Jump to: navigation, search
See also: a3 and A-3



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


A3 (usually uncountable, plural A3s)

  1. A standard paper size, defined by ISO 216.
    dimensions: 420 x 297 mm (420.448 x 297.302 mm)
  2. (countable, management) A one-page document, often tabular or graphical, on such paper.
  3. (Britain, rail transport) A3 class, a class of steam locomotive used on the London and North Eastern Railway.

See also[edit]