perpendicular

(noun) a straight line at right angles to another line.

(noun) a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting. Synonyms: perpendicular style, English-Gothic, English-Gothic architecture.

(noun) 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. Synonyms: plumb line.

(noun) an extremely steep face.

(adj) intersecting at or forming right angles. Synonyms: perpendicular (vs. oblique) (vs. parallel). Example: "The axes are perpendicular to each other."

(adj) at right angles to the plane of the horizon or a base line. Synonyms: vertical (vs. inclined) (vs. horizontal). Examples: "A vertical camera angle." "The monument consists of two vertical pillars supporting a horizontal slab." "Measure the perpendicular height."

(adj) extremely steep. Example: "The great perpendicular face of the cliff."