n. 1. an element to which an operation, function, predicate, etc. applies; especially the independent variable of a function. 2. another word for the amplitude or phase of a complex number. Compare modulus. 3. (Logic) a. a process or instance of inductive or deductive reasoning that purports to show its conclusion to be true.
b. a sequence of statements one of which is the conclusion and the remainder the premises.
c. formally, an ordered pair the first element of which is a set of statements (the premises), and the second element of which is a single statement (the conclusion).