Definition of: vertical

(vûr′ti·kəl) adjective
1. Of or pertaining to the vertex.
2. Occupying a position directly above or overhead; being at the highest point.
3. Directed perpendicularly to the plane of the horizon; upright: plumb.
4. Of or pertaining to the crown of the head.
5. Bot. a Perpendicular to the surface or to the axis of support. b In the direction of the axis of growth; lengthwise.
6. Econ. Of or pertaining to a business concern that undertakes a process from raw material to consumer: a vertical trust.
—noun
1. A vertical line, plane, or circle.
2. An upright beam or rod in a truss. [<MF <L verticalis <vertex, -icis VERTEX]
—ver′ti·cal′i·ty (-kal′ə·tē), ver′ti·cal·ness noun
—ver′ti·cal·ly adverb