noun

• One of the four sections made by dividing an area with two perpendicular lines.
• (mathematics) One of the four regions of the Cartesian plane bounded by the x-axis and y-axis.
• (geometry) One fourth of a circle or disc; a sector with an angle of 90°.
• (nautical) A measuring device with a graduated arc of 90° used in locating an altitude.
• (college basketball) One of the four categories of team wins and losses, as categorized by strength of schedule.
• (obsolete) A square or quadrangle.