denial

An assertion of untruth.countableuncountable

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

The negation in logic.countableuncountable

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

A refusal or failure to provide or grant something that is requested or desired.countableuncountable

• The denial of medical treatment to those who cannot afford to pay is scandalous.
• I cannot understand the bank's denial of my loan application.

Refusal to believe that a problem exists.countableuncountable

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

Refusal to admit responsibility for wrongdoing.countableuncountable

• Denial is the first act when the perpetrator refutes the very nature of the planned measures, explaining the steps as justified and legitimate actions to cope with the identified problem. The denial then lives on during the different stages

Negationism, denialism of historical facts or accepted interpretation.countableuncountable

• The sheer length of the list demonstrates the hold denial wields over states and societies, a power that may be best understood empirically by delving further into the two best-documented cases of Holocaust and Armenian [genocide] denial.
• However, just as genocide is understood by some—including Raphael Lemkin—as a kind of radical, perverse act of creation, so too, denial does not aim only at a negation of reality but also at the creation of a new reality.

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

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

A disownment or disavowalcountableuncountable

• The denial of Jesus by Peter.