<p><strong>Noun</strong></p><ul><li>a cardinal number, 1 plus 1</li><li>a symbol for this number, as 2 or II</li><li>a set of this many persons or things</li><li>a playing card, die face, or half of a domino face with two pips</li></ul><p><strong>Adjective</strong></p><ul><li>amounting to two in number</li></ul>