perpendicular in WordNet English dictionary

1. a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
   perpendicular  perpendicular style  English-Gothic  English-Gothic architecture 
   
2. an extremely steep face
   perpendicular 
   
3. 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
   plumb line  perpendicular 
   
4. a straight line at right angles to another line
   perpendicular 
   

1. intersecting at or forming right angles
   "the axes are perpendicular to each other"
   perpendicular 
   
2. at right angles to the plane of the horizon or a base line
   "a vertical camera angle"; "the monument consists of two vertical pillars supporting a horizontal slab"; "measure the perpendicular height"
   vertical  perpendicular 
   
3. extremely steep
   "the great perpendicular face of the cliff"
   perpendicular