Clues for the word "PERPENDICULAR"

We've had 4 crossword clues used for this word, and seen it 4 times in crosswords. It was last seen in Guardian Quick crossword on April 27, 2015.

Definition of perpendicular

a. - 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.
a. - At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.
n. - A line at right angles to the plane of the horizon; a vertical line or direction.
n. - A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.