Source : Webster's Revised Unabridged Dictionary (1913)

Overdraw \O`ver*draw"\, v. t. [imp. {Overdrew}; p. p.
   {Overdrawn}; p. pr. & vb. n. {Overdrawing}.]
   1. To exaggerate; to overdo.

   2. (Banking) To make drafts upon or against, in excess of the
      proper amount or limit.