Source : Webster's Revised Unabridged Dictionary (1913)

Disdainful \Dis*dain"ful\, a.
   Full of disdain; expressing disdain; scornful; contemptuous;
   haughty.

         From these Turning disdainful to an equal good.
                                                  --Akenside.
   -- {Dis*dain"ful*ly}, adv. -- {Dis*dain"ful*ness}, n.

Source : WordNet®

disdainful
     adj 1: expressing extreme contempt [syn: {contemptuous}, {insulting},
             {scornful}]
     2: having or showing arrogant superiority to and disdain of
        those one views as unworthy; "some economists are
        disdainful of their colleagues in other social
        disciplines"; "haughty aristocrats"; "his lordly manners
        were offensive"; "walked with a prideful swagger"; "very
        sniffy about breaches of etiquette"; "his mother eyed my
        clothes with a supercilious air"; "shaggy supercilious
        camels"; "a more swaggering mood than usual"- W.L.Shirer
        [syn: {haughty}, {lordly}, {prideful}, {sniffy}, {supercilious},
         {swaggering}]