Source : Webster's Revised Unabridged Dictionary (1913)

Dolt \Dolt\, n. [OE. dulte, prop. p. p. of dullen to dull. See
   {Dull}.]
   A heavy, stupid fellow; a blockhead; a numskull; an
   ignoramus; a dunce; a dullard.

         This Puck seems but a dreaming dolt.     --Drayton.

Dolt \Dolt\, v. i.
   To behave foolishly. [Obs.]

Source : WordNet®

dolt
     n : a person who is not very bright; "The economy, stupid!"
         [syn: {stupid}, {stupid person}, {dullard}, {pudding head},
          {pudden-head}, {poor fish}, {pillock}]