Source : Webster's Revised Unabridged Dictionary (1913)

Overweening \O`ver*ween"ing\, a.
   Unduly confident; arrogant; presumptuous; conceited. --
   {O`ver*ween"ingly}, adv. --Milton. -- {O`ver*ween"ing*ness},
   n.

         Here's an overweening rogue.             --Shak.