Source : Webster's Revised Unabridged Dictionary (1913)

Denial \De*ni"al\, n. [See {Deny}.]
   1. The act of gainsaying, refusing, or disowning; negation;
      -- the contrary of {affirmation}.

            You ought to converse with so much sincerity that
            your bare affirmation or denial may be sufficient.
                                                  --Bp.
                                                  Stillingfleet.

   2. A refusal to admit the truth of a statement, charge,
      imputation, etc.; assertion of the untruth of a thing
      stated or maintained; a contradiction.

   3. A refusal to grant; rejection of a request.

            The commissioners, . . . to obtain from the king's
            subjects as much as they would willingly give, . . .
            had not to complain of many peremptory denials.
                                                  --Hallam.

   4. A refusal to acknowledge; disclaimer of connection with;
      disavowal; -- the contrary of confession; as, the denial
      of a fault charged on one; a denial of God.

   {Denial of one's self}, a declining of some gratification;
      restraint of one's appetites or propensities; self-denial.

Source : WordNet®

denial
     n 1: the act of refusing to comply (as with a request); "it
          resulted in a complete denial of his privileges"
     2: the act of asserting that something alleged is not true
     3: (psychiatry) a defense mechanism that denies painful
        thoughts
     4: renunciation of your own interests in favor of the interests
        of others [syn: {abnegation}, {self-abnegation}, {self-denial},
         {self-renunciation}]
     5: a defendant's answer or plea denying the truth of the
        charges against him; "he gave evidence for the defense"
        [syn: {defense}, {defence}, {demurrer}] [ant: {prosecution}]