Quadrant 1 graph paper. These four regions are called quadrants because they each represent one-quarter of the whole coordinate plane. In the cartesian system, the coordinate plane is divided into four equal parts by the intersection of the x-axis (the horizontal number line) and the y-axis (the vertical number line). The meaning of QUADRANT is an instrument for measuring altitudes consisting commonly of a graduated arc of 90 degrees with an index or vernier and usually having a plumb line or spirit level for fixing the vertical or horizontal direction. It is used to determine the position of a point in a plane. See examples of quadrant used in a sentence. A quadrant can be defined as a region/part of a cartesian plane that is obtained when the two axes intersect each other. A quadrant is a region defined by the two axes (x-axis and y-axis) of the coordinate system. These two axes intersect each other at 90°, and the four regions so formed are called the four quadrants, namely the I-quadrant, II-quadrant, III-quadrant, and IV-quadrant. Definition of quadrant noun in Oxford Advanced American Dictionary. . zeg azpxknqr orbqrw cbfegr dwyanzd xmpmb xjea wsbj itwxb yey