English Dictionary

Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one.
Source : opted (169073)  - auto

Perpendicular to the plane of the horizon; upright; plumb; as, a vertical line.
Source : opted (169074)  - auto

Vertical position; zenith.
Source : opted (169075)  - auto

A vertical line, plane, or circle.
Source : opted (169076)  - auto