Mathematics. an equation or inequality containing one or more variables in which its truth or falsehood depends upon the values assumed by the variables in a particular instance, as the equation x + 3 = 8.
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Logic.a propositional function that contains a free variable, as “ x is a man.”
logicpropositional function, Also called: sentential function an expression containing a free variable that can be replaced by a name to yield a sentence, as x is wise