<p><strong>Noun</strong></p><ul><li>the point on the celestial sphere vertically above a given position or observer.</li><li>Antonyms: nadir</li><li>a highest point or state; culmination.</li><li>Synonyms: summit, apex</li><li>Antonyms: nadir</li><li>any pointed, towering part or formation, as of rock.</li></ul>