Dictionary definition · perpendicular
noun
- a straight line at right angles to another line
- a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
- 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
- an extremely steep face
adjective
- intersecting at or forming right angles"the axes are perpendicular to each other"
- at right angles to the plane of the horizon or a base line"a vertical camera angle"
- so steep as to be nearly vertical"the great perpendicular face of the cliff"
Source: Open English WordNet (CC BY 4.0).