1 Higher doses can cause impairment of memory, judgment and coordination, irritability, paranoia,3 and suicidal thoughts. Some people experience the opposite of the intended effect, such as agitation or aggression.
Adj. 1. vertical-at 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. perpendicular.
Definition of Perpendicular. 1. [n -S] 1. 1. Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth. 2. at right angles to a given line or surface; as, the line ad is perpendicular to the line bc.