Source : Webster's Revised Unabridged Dictionary (1913)

Brain \Brain\, v. t. [imp. & p. p. {Brained}; p. pr. & vb. n.
   {Braining}.]
   1. To dash out the brains of; to kill by beating out the
      brains. Hence, Fig.: To destroy; to put an end to; to
      defeat.

            There thou mayst brain him.           --Shak.

            It was the swift celerity of the death . . . That
            brained my purpose.                   --Shak.

   2. To conceive; to understand. [Obs.]

            ?T is still a dream, or else such stuff as madmen
            Tongue, and brain not.                --Shak.

Brained \Brained\, p.a.
   Supplied with brains.

         If th' other two be brained like us.     --Shak.