1. one of four equal parts into which something is divided by two perpendicular lines
2. a quarter of a circle or sphere
Usage: geometry
3. an instrument used for measuring angles, especially in navigation and astronomy
Usage: nautical; astronomy

Examples

• The city was divided into four quadrants by the main streets.
• The graph shows data points in each quadrant of the coordinate plane.
• The architect drew a quadrant to show the curved corner of the building.
• Ancient sailors used a quadrant to navigate by the stars.
• The upper right quadrant of the chart contains the highest values.
• She measured the angle using a brass quadrant.
• The pain was located in the lower left quadrant of his abdomen.