<p><strong>Noun:</strong></p><ul><li>A cardinal number, eight plus one.</li><li>A symbol for this number, as 9 or IX.</li><li>A set of this many persons or things.</li><li>A baseball team.</li><li>A playing card with nine pips.</li><li>The Nine, the Muses.</li></ul><p><strong>Adjective:</strong></p><ul><li>Amounting to nine in number.</li></ul>