disqualification

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of disqualifying or the condition of having been disqualified.
• noun Something that disqualifies.

from The Century Dictionary.

• noun The act of disqualifying.
• noun The state of being disqualified; want of qualification; absence or deprivation of ability, power, or capacity; any disability or incapacity.
• noun That which disqualifies or incapacitates: as, conviction of crime is a disqualification for public office.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of disqualifying, or state of being disqualified; want of qualification; incompetency; disability.
• noun That which disqualifies; that which incapacitates or makes unfit

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The act of disqualifying, or state of being disqualified; want of qualification; incompetency; disability; as, the disqualification of men for holding certain offices.
• noun 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun unfitness that bars you from participation
• noun the act of preventing someone from participating by finding them unqualified