Source : Webster's Revised Unabridged Dictionary (1913)

Fastuous \Fas"tu*ous\, a. [L. fastuosus, from fastus
   haughtiness, pride: cf. F. fastueux.]
   Proud; haughty; disdainful. [Obs.] --Barrow. --
   {Fas"tu*ous*ness}, n. [Obs.] --Jer. Taylor.