The regions are named as the first quadrant , second quadrant , third quadrant , and fourth quadrant . Quadrants includes both positive and negative value of the x-axis and y-axis. The axes are numbered in the counterclockwise direction. The numbering of quadrants starts from the upper right or northeast segment. Quadrant is defined as a region in space that is divided into four equal parts by two axes namely the X-axis and the Y-axis in the Cartesian Plane. These two axes intersect each other at 90° and the four regions so formed are called four quadrants, namely I- quadrant , II- quadrant , III- quadrant , and IV- quadrant . The Cartesian plane, formed by the X and Y axes, is split into four quadrants, each with distinct characteristics: First Quadrant : Located in the upper right, both x and y-coordinates ... QUADRANT definition: 1. a quarter of a circle 2. a quarter of an area: 3. a device for measuring the height of stars in…. Learn more. Learn what a quadrant is, how to plot points and trigonometric functions in different quadrants, and see examples and practice questions. A quadrant is a region of a coordinate plane formed by the intersection of x-axis and y-axis.