Vertical a. : Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one.

Vertical a. : Perpendicular to the plane of the horizon; upright; plumb; as, a vertical line.

Vertical n. : Vertical position; zenith.

Vertical n. : A vertical line, plane, or circle.

Example:
Why do people have a higher Vertical leap with a run up compared to jumping from a standing start?

Taxonomy
free encyclopedia, company, music, vertical integration, search, free dictionary, vertical line, vertical position, up-down, science, the force, force of gravity, plumb line, mathematics, musical interval, business, management, ownership.

Defination from the web:
vertical position when it is aligned in an "up-down" direction, roughly speaking perpendicular to the horizon or horizontal plane. ... Vertical market, a group of similar businesses and customers which engage in trade based on specific and specialized needs ...