SG Heritage Dictionary

Perpendicular [Adjective] Webster's Dictionary 1828

1. Hanging or extending in a right line from any point towards the center of the earth or of gravity, or at right angles with the plane of the horizon.

2. In geometry, falling directly on another line at right angles. The line A is perpendicular to the line B.

Perpendicular [Noun] Webster's Dictionary 1828

1. A line falling at right angles on the plane of the horizon, that is, extending from some point in a right line towards the center of the earth or center of gravity, or any body standing in that direction.

2. In geometry, a line falling at right angles on another line, or making equal angles with it on each side.

Perpendicular [Adjective] Webster's Dictionary 1913

1. Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth.

2. At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.

Perpendicular [Noun] Webster's Dictionary 1913

1. A line at right angles to the plane of the horizon; a vertical line or direction.

2. A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.

Perpendicularity [Noun] Webster's Dictionary 1828

The state of being perpendicular.

Perpendicularity [Noun] Webster's Dictionary 1913

The quality or state of being perpendicular.

Perpendicularly [Adverb] Webster's Dictionary 1828

1. In a manner to fall on another line at right angles.

2. So as to fall on the plane of the horizon at right angles; in a direction towards the center of the earth or of gravity.

Perpendicularly [Adverb] Webster's Dictionary 1913

In a perpendicular manner; vertically.