- The definition of a quadrant is a fourth or quarter portion of a circle.
An example of a quadrant is one slice of pie that's been cut into four equal pieces.
Each quadrant contains a different kind of popcorn.
- a fourth part of the circumference of a circle; an arc of 90°
- a quarter section of a circle
- any piece or part shaped like a quarter section of a circle
- an instrument similar to the sextant in design and function, and superseded by it
- Geom. any of the four parts formed by rectangular coordinate axes on a plane surface
Origin of quadrantMiddle English ; from Classical Latin quadrans, fourth part ; from quadrare: see quadrate
- Mathematics a. A circular arc of 90°; one fourth of the circumference of a circle.b. The plane area bounded by such an arc and two perpendicular radii.c. Any of the four areas into which a plane is divided by the reference axes in a Cartesian coordinate system, designated first, second, third, and fourth, counting counterclockwise from the area in which both coordinates are positive.
- A machine part or other mechanical device that is shaped like a quarter circle.
- An early instrument for measuring altitude of celestial bodies, consisting of a 90° graduated arc with a movable radius for measuring angles.
Origin of quadrantMiddle English, quarter of a day, from Latin quadrāns, quadrant-, a fourth part; see kwetwer- in Indo-European roots.
- One of the four sections made by dividing an area with two perpendicular lines.
- (mathematics) 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.
From Latin quadrantem, accusative singular of quadrāns (“fourth part of something, quarter”).