What is the definition of quadrant?

Answer 1

The fourth part; the quarter., The quarter of a circle, or of the circumference of a circle, an arc of 90¡, or one subtending a right angle at the center., One of the four parts into which a plane is divided by the coordinate axes. The upper right-hand part is the first quadrant; the upper left-hand part the second; the lower left-hand part the third; and the lower right-hand part the fourth quadrant., An instrument for measuring altitudes, variously constructed and mounted for different specific uses in astronomy, surveying, gunnery, etc., consisting commonly of a graduated arc of 90¡, with an index or vernier, and either plain or telescopic sights, and usually having a plumb line or spirit level for fixing the vertical or horizontal direction.

Answer 2

A quadrant is one of the four sectors into which a coordinate plane is divided by the x-axis and the y-axis. Each quadrant is numbered from I to IV, starting from the top-right and going counterclockwise. Quadrants are used to locate points on a coordinate plane and determine their position relative to the origin.