1. Any of the four areas into which a plane is divided by two orthogonal coordinate axes
   "The point (3, 4) is located in the first quadrant of the Cartesian plane"
    
2. The area enclosed by two perpendicular radii of a circle
   "The mathematician divided the circle into four equal quadrants"
    
3. A quarter of the circumference of a circle
   "The architect incorporated a quadrant window into the design";
   - quarter-circle
    
4. A measuring instrument for measuring altitude of heavenly bodies
   "The navigator used a quadrant to determine the ship's position based on the stars"

Derived forms: quadrants

Type of: area, country, line, measuring device, measuring instrument, measuring system

Encyclopedia: Quadrant