WWWebster
4 : an abstract or summary especially of a literary work <a later editor added an argument to the poem> 5 : the subject matter especially of a literary work 6 a : one of the independent variables upon whose value that of a function depends b : a substantive (as the direct object of a transitive verb) that is required by a predicate in grammar c : the angle assigned to a complex number when it is plotted in a complex plane using polar coordinates -- called also amplitude; compare ABSOLUTE VALUE 2