1. having four angles and four sides; rectangular or square in shape
2. relating to or involving four parties, groups, or elements
Usage: formal

Examples

• The courtyard had a quadrangular design with buildings on all four sides.
• Students gathered in the quadrangular plaza between the dormitories.
• The quadrangular table provided equal seating for all participants.
• The architect designed a quadrangular garden with pathways along each edge.
• The quadrangular alliance involved four neighboring countries.
• The building’s quadrangular footprint maximized the available space.