Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Being or situated at right angles to the horizon; upright.
  • adj. Situated at the vertex or highest point; directly overhead.
  • adj. Anatomy Of or relating to the vertex of the head.
  • adj. Economics Relating to or involving all stages from production to sale: vertical integration.
  • adj. Relating to or composed of elements at different levels, as of society.
  • n. Something vertical, as a line, plane, or circle.
  • n. A vertical position.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A vertex or zenith.
  • n. A vertical geometrical figure; a perpendicular.
  • n. An individual slat in a set of vertical blinds.
  • n. A vertical component of a structure.
  • adj. Along the direction of a plumbline or along a straight line that includes the center of the Earth.
  • adj. In a two dimensional Cartesian co-ordinate system, describing the axis oriented normal (perpendicular, at right angles) to the horizontal axis.
  • adj. Of or pertaining to vertical markets.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one.
  • adj. Perpendicular to the plane of the horizon; upright; plumb.
  • n. Vertical position; zenith.
  • n. A vertical line, plane, or circle.

from The Century Dictionary and Cyclopedia

  • Of or relating to the vertex; situated at the vertex, apex, or highest point; placed in the zenith, or point in the heavens directly overhead; figuratively, occupying the highest place.
  • Specifically, being in a position or direction perpendicular to the plane of the horizon; upright; plumb.
  • In medicine, of or relating to the vertex, or crown of the head.
  • In zoology and anatomy: Pertaining to or placed on the vertex, or crown of the head; sincipital; coronal: as, vertical stemmata of an insect; vertical eyes of a fish; the vertical crest of some birds is horizontal when not erected.
  • Placed or directed upward or downward; upright or downright; being at right angles with an (actual or assumed) horizon.
  • See circle.
  • In conic sections, a plane passing through the vertex of a cone and through its axis.
  • In perspective, a plane perpendicular to the geometrical plane, passing through the eye, and cutting the perspective plane at right angles.
  • n. A vertical circle, plane, or line.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. something that is oriented vertically
  • adj. upright in position or posture
  • n. a vertical structural member as a post or stake
  • adj. relating to or involving all stages of a business from production to distribution
  • adj. of or relating to different levels in a hierarchy (as levels of social class or income group)
  • adj. at right angles to the plane of the horizon or a base line

Etymologies

Late Latin vertic─ülis, overhead, from Latin vertex, vertic-, highest point; see vertex.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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