Source : Webster's Revised Unabridged Dictionary (1913)

Obtusion \Ob*tu"sion\, n. [L. obtusio, from obtundere to blunt.
   See {Obtund}.]
   1. The act or process of making obtuse or blunt.

   2. The state of being dulled or blunted; as, the obtusion of
      the senses. --Harvey.