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conjunction,
n. 1. (Logic) also called logical product. a. the binary truth-functional sentential connective that forms a compound sentence from two given sentences, and corresponds to the English and. Its truth-table is shown here

b. a sentence so formed, usually written P & Q, PQ, or P.Q, where P and Q are the component sentences (the conjuncts); a conjunctive statement is true if and only if its conjuncts are both true.
c. any generalization of this operation or relation, or any sentence formed thereby, such as an operator the argument of which is a set of statements and the value of which is a single statement that is true when and only when all the elements of the given set are true. 2. (Grammar) any expression that combines sentences to form more complex sentences; the ordinary language equivalents of sentential connectives. Thus conjunction in the preceding sense is not the only conjunction in this sense; confusion may result.