A3 (Portugal)
WiktionaryText

Etymology 1


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

Noun


A3
  1. A standard paper size, defined by ISO 216.
    dimensions: 420 x 297 mm (420.448 x 297.302 mm)

Proper noun


A3
  1. A major thoroughfare in England
    Take the A3 road to Portsmouth.
 
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