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Noun: negation  ni'gey-shun
  1. A negative statement; a statement that is a refusal or denial of some other statement
    "His firm 'no' was a clear negation of the proposal"
     
  2. The speech act of negating
    "His negation of the accusations was vehement"; "The scientist's negation of the theory sparked a debate"
     
  3. (logic) a proposition that is true if and only if another proposition is false
    "The negation of 'It is raining' is 'It is not raining'"

Derived forms: negations

Type of: denial, disaffirmation, proposition, statement

Encyclopedia: Negation