<p><strong>Conjunction</strong></p><ul><li>(used to introduce the first of two or more alternatives, and sometimes repeated before the second or later alternative, usually with the correlative or):<ul><li>It matters little whether we go or stay.</li><li>Whether we go or whether we stay, the result is the same.</li></ul></li><li>(used to introduce a single alternative, the other being implied or understood, or some clause or element not involving alternatives):<ul><li>See whether or not she has come.</li><li>I doubt whether we can do any better.</li></ul></li><li>Archaic. (used to introduce a question presenting alternatives, usually with the correlative or.)</li></ul><p><strong>Pronoun</strong></p><ul><li>Archaic. which or whichever (of two)?</li></ul>