Mathematics Intersecting at or forming right angles.
Being at right angles to the horizontal; vertical. See Synonyms at vertical.
often Of or relating to a style of English Gothic architecture of the 1300s and 1400s, characterized by the use of fan vaulting and broad windows with many mullions.
Mathematics A line or plane perpendicular to a given line or plane.
A perpendicular position.
A device, such as a plumb line, that is used in marking the vertical from a given point.