Source : Webster's Revised Unabridged Dictionary (1913)

Blank \Blank\, v. t. [imp. & p. p. {Blanked}; p. pr. & vb. n.
   {Blanking}.] [Cf. 3d {Blanch}.]
   1. To make void; to annul. [Obs.] --Spenser.

   2. To blanch; to make blank; to damp the spirits of; to
      dispirit or confuse. [Obs.]

            Each opposite that blanks the face of joy. --Shak.