denial

noun

• The negation in logic.

  "The denial of "There might be X" is the null, "False, there is no X.""

• A refusal to comply with a request.

  "Every time we asked for an interview we got a denial."

• An assertion of untruth.

  "The singer has issued a sweeping denial of all the rumors."

• Refusal to believe a problem exists

  "We couldn't break through his denial about being alcoholic."

• A defense mechanism involving a refusal to accept the truth of a phenomenon or prospect.

  "He is in denial that he has a drinking problem."