perpendicular Meaning and Definition
1. a. at right angles to the plane of the horizon or a base line
2. a. intersecting at or forming right angles
3. n. an extremely steep face
4. n. a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point
5. n. a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
6. n. a straight line at right angles to another line
7. s. extremely steep
In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees).
Synonyms erect on end orthogonal plumb sheer stand-up standing steep straight straight-up upright vertical
Antonyms horizontal
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