a function that determines the truth-value of a complex sentence solely in terms of the truth-values of the component sentences without reference to their meaning
2.
a complex sentence whose truth-value is so determined, such as a negation or conjunction
truth-function in American English
(ˈtruːθˌfʌŋkʃən)
noun
Logic
a statement so constructed from other statements that its truth-value depends on the truth-values of the other statements rather than on their meanings