The relative size ofA1 paper. A1
( international standards ) ISO 216 standard paper size of 594 mm × 841 mm (23.39 in × 33.11 in), with a surface area of 0.5m2 sq ft ( finance ) Long-term bond credit rating byMoody's Investors Service , indicating that a bond isupper-medium grade with lowrisk ofdefault .From various rating systems, as that ofLloyd's of London or the condition of insured ships. First attested in 1837.
A1 (notcomparable )
( informal ) ( informal ) ( of a ship ) First-class .( CompareA 2 andA 3 , which are inferior grades. ) A1 (plural A1s
Under theInternational Union of Railways (French:Union internationale des chemins de fer ,UIC ) classification system, asteam locomotive that has two coupleddriving wheels followed by twotrailing wheels , with noleading wheels ; also called an0-2-2 . A1
( Hong Kong Cantonese ) front page of anewspaper requests for deletion (+ ) .Please see that page for discussion and justifications. You may continue to edit this entry while the discussion proceeds, but please mention significant edits at the RFD discussion and ensure that the intention of votes already cast is not left unclear. Do not remove the{{rfd }} until the debate has finished.
See the Wikipedia articleISO 216 , the international standard on paper sizes.
A1 ( uncountable )
A1 ( a standard paper size, defined by ISO 216 ) 
