Results

Definition of perpendicular : 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.
3. At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.
4. 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.

Synonyms:

baronial, perpendicular style, right, rectangular, degree, axis, cos, plumb line, carbuncle, beachfront, carpeted, cotangent, square, median, inclined plane, upended, colonial, orthogonal, oblique, diameter, brownstone, horizontal, english-gothic, line, arc, cavernous, unsloped, standing, upstanding, comfortable, normal, raised, obtuse, English-Gothic architecture, flat, cosine, outline, diagonal, burned-out, curvature, level, appointed, minute, stand-up, chord

straight, plumb, unbent, undeviating, unswerving, direct

up-and-down, sheer, upright, vertical, longitudinal, steep, erect, at degrees

Usage examples:

• Down the rugged and almost perpendicular descent, the dog, without any hesitation, began to make his way. - "True Stories about Cats and Dogs", Eliza Lee Follen.
• On the other side it was perpendicular. - "The Scottish Chiefs", Jane Porter.
• Spaniards were not birds of prey to fly up those perpendicular heights, and for beings without wings the thing was impossible. - "Project Gutenberg History of The Netherlands, 1555-1623, Complete", John Lothrop Motley.