| 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 |
| 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 |
| noun | an extremely steep face |
| adjective | intersecting at or forming right angles “the axes are perpendicular to each other” |
| adjective | at right angles to the plane of the horizon or a base line “a vertical camera angle” |
| adjective | extremely steep “the great perpendicular face of the cliff” |
| perpendicular | adjective | intersecting at or forming right angles |
| perpendicular | noun | a straight line at right angles to another line |
| perpendicularity | noun | the relation of opposition between things at right angles |
| vertical | noun | something that is oriented vertically |
| verticalness | noun | position at right angles to the horizon |
| verticality | noun | position at right angles to the horizon |