<p><strong>Adjective</strong></p><ul><li>being in a position or direction perpendicular to the plane of the horizon;</li><li>upright;</li><li>plumb.</li><li>Antonyms: horizontal</li><li>of, relating to, or situated at the vertex.</li><li>of or relating to the cranial vertex.</li><li>Botany: (of a leaf) having the blade in a perpendicular plane, so that neither of the surfaces can be called upper or lower.</li><li>being in the same direction as the axis; lengthwise.</li><li>of, constituting, or resulting in vertical combination.</li><li>of or relating to a product or service from initial planning to sale.</li><li>of, relating to, or noting a stratified society, nation, etc.</li></ul><p><strong>Noun</strong></p><ul><li>something vertical, as a line or plane.</li><li>a vertical or upright position.</li><li>a vertical structural member in a truss.</li></ul>