<p><strong>Noun</strong></p><ul><li>The needless repetition of an idea, especially in words other than those of the immediate context, without imparting additional force or clearness, as in "widow woman."</li><li>An instance of such repetition.</li><li>Logic: A compound propositional form all of whose instances are true, as "A or not A."</li><li>An instance of such a form, as "This candidate will win or will not win."</li></ul>