Source : Webster's Revised Unabridged Dictionary (1913)

Disqualification \Dis*qual`i*fi*ca"tion\, n.
   1. The act of disqualifying, or state of being disqualified;
      want of qualification; incompetency; disability; as, the
      disqualification of men for holding certain offices.

   2. That which disqualifies; that which incapacitates or makes
      unfit; as, conviction of crime is a disqualification of a
      person for office; sickness is a disqualification for
      labor.

            I must still retain the consciousness of those
            disqualifications which you have been pleased to
            overlook.                             --Sir J.
                                                  Shore.

Source : WordNet®

disqualification
     n 1: unfitness that bars you from participation
     2: the act of preventing someone from participating by finding
        them unqualified