A1
WiktionaryText
Etymology 1
See the Wikipedia article ISO 216, the international standard on paper sizes.
Noun
- A standard paper size, defined by ISO 216 to have dimensions: 841 x 594 mm (840.90 x 594.60 mm)
- a sheet of A1 paper
See also
Etymology 2
from various rating systems, as that of Lloyd's of London or the condition of insured ships.
Proper noun
A1
- A major thoroughfare in England
- You should take the A1 north from Newcastle.
- Under the International Union of Railways ("UIC") classification system, a steam locomotive that has two coupled driving wheels followed by two trailing wheels, with no leading wheels; also called an 0-2-2.