Definitions
1.NounOne of the four sections made by dividing an area with two perpendicular lines.
2.NounOne of the four regions of the Cartesian plane bounded by the x-axis and y-axis.
3.NounOne fourth of a circle or disc; a sector with an angle of 90°.
4.NounA measuring device with a graduated arc of 90° used in locating an altitude.
5.NounOne of the four categories of team wins and losses, as categorized by strength of schedule.
6.NounA square or quadrangle.