(1) an imaginary line perpendicular (at an angle of 90°) to the plane of the horizon (2) Said of a borehole which is straight Not deviated
Something that is vertical stands or points straight up. The gadget can be attached to any vertical or near vertical surface. horizontal + vertically ver·ti·cal·ly Cut each bulb in half vertically
something that is oriented vertically 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