<p><strong>Noun</strong></p><ul><li>the highest point of something; apex; summit; top: the vertex of a mountain.</li><li>Anatomy, Zoology: the crown or top of the head.</li><li>Craniometry: the highest point on the midsagittal plane of the skull or head viewed from the left side when the skull or head is in the Frankfurt horizontal.</li><li>Astronomy: a point in the celestial sphere toward which or from which the common motion of a group of stars is directed.</li><li>Geometry: the point farthest from the base: the vertex of a cone or of a pyramid.</li><li>a point in a geometrical solid common to three or more sides.</li><li>the intersection of two sides of a plane figure.</li></ul>