(a)vertical, perpendicularat right angles to the plane of the horizon or a base line“a vertical camera angle”, “the monument consists of two vertical pillars supporting a horizontal slab”, “measure the perpendicular height”
(a)erect, vertical, uprightupright in position or posture“an erect stature”, “erect flower stalks”, “for a dog, an erect tail indicates aggression”, “a column still vertical amid the ruins”, “he sat bolt upright”