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In an erect position or posture; perpendicular; vertical, or nearly vertical; pointing upward; as, an upright tree. With chattering teeth, and bristling hair upright. Dryden. All have their ears upright. Spenser.

or strip of metal, or slip of wood, often cut into some fanciful form, and placed upon a perpendicular axis around which it moves freely. Aye undiscreet, and changing as a vane. Chaucer.

he vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. Charity . . . is the vertical top of all religion. Jer. Taylor.

In a vertical manner, position, or direction; perpendicularly; as, to look down vertically; to raise a thing vertically.

Having sides nearly perpendicular; -- said of certain vessels to distinguish them from those having flaring sides, or sides tumbling home (see under Tumble, v. i.).

A fall, or perpendicular descent, of the water of a river or stream, or a descent nearly perpendicular; a cascade; a cataract.

willow (Salix Babylonica) whose branches grow very long and slender, and hang down almost perpendicularly.

The system made up of a force and a couple of forces in a plane perpendicular to that force. Any number of forces acting at any points upon a rigid body may be compounded so as to be equivalent to a wrench. Carriage wrench, a wrench adapted for removing or tightening the nuts that confine the wheels on the axles, or fo…

n two parallel planes; the portion of a surface of revolution included between two planes perpendicular to the axis. Davies & Peck (Math. Dict.)