<p><strong>Noun</strong></p><ul><li>Geology: the angle between a fault plane and the vertical, measured perpendicular to the strike of the fault; complement of the dip.</li><li>Mining: the inclination of a vein or seam from the vertical.</li></ul><p><strong>Verb</strong></p><ul><li>(used without object): (of a fault, vein, or seam) to incline from a vertical position.</li></ul>