a. [ OE. forti, fourti, fowerti, AS. feówertig; feówer four + suff. -tig ten; akin to OS. fiwartig, fiartig, D. veertig, G. vierzig, Icel. fjörutīu, Sw. fyratio, Dan. fyrretyve, Goth. fidwōr tigjus. See Four, and Ten, and cf. Fourteen. ] Four times ten; thirty-nine and one more. [ 1913 Webster ]
n.;
n. One the miners who took part in the California gold rush in 1849; an argonaut. [ Colloq., U. S. ] [ Webster 1913 Suppl. ]
n. (Zool.) The Tasmanian forty-spotted diamond bird (Pardalotus quadragintus). [ 1913 Webster ]