Definition of quadrant
- quadrant Noun One of the four sections made by dividing an area with two perpendicular lines.
- quadrant Noun The four regions of the Cartesian plane bounded by the x-axis and y-axis.
- quadrant Noun One fourth of a circle or disc; a sector with an angle of 90°.
- quadrant Noun A measuring device with a graduated arc of 90° used in locating an altitude.