Definition of truth function in US English:

truth function


  • A function whose truth value is dependent on the truth value of its arguments.

    • ‘For degrees of truth, disjunction is a truth function.’
    • ‘The fuzzy set degree of membership value is a consequence of the sets intrinsic truth function.’
    • ‘If ‘if’ is truth-functional, this is the right truth function to assign to it: of the sixteen possible truth-functions of A and B, it is the only serious candidate.’