The Collaborative International Dictionary of English v.0.48:

dolt \dolt\ (d[=o]lt; 110), 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.
   [1913 Webster]

         This Puck seems but a dreaming dolt.     --Drayton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

dolt \dolt\, v. i.
   To behave foolishly. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

dolt
    n 1: a person who is not very bright; "The economy, stupid!"
         [syn: stupid, stupid person, stupe, dullard,
         dolt, pudding head, pudden-head, poor fish,
         pillock]