The Collaborative International Dictionary of English v.0.48:

Point-blank \Point`-blank"\, a.
   1. Directed in a line toward the object aimed at; aimed
      directly toward the mark.
      [1913 Webster]

   2. Hence, direct; plain; unqualified; -- said of language;
      as, a point-blank assertion.
      [1913 Webster]

   Point-blank range, the extent of the apparent right line of
      a ball discharged.

   Point-blank shot, the shot of a gun pointed directly toward
      the object to be hit.
      [1913 Webster]