quadrant

noun

quad·​rant ˈkwä-drənt How to pronounce quadrant (audio)
1
a
: 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
b
: a device or mechanical part shaped like or suggestive of the quadrant of a circle
2
a
: an arc of 90 degrees that is one quarter of a circle
b
: the area bounded by a quadrant and two radii
3
a
: any of the four parts into which a plane is divided by rectangular coordinate axes lying in that plane
b
: any of the four quarters into which something is divided by two real or imaginary lines that intersect each other at right angles
quadrantal adjective

Illustration of quadrant

Illustration of quadrant
  • quadrant 2

Did you know?

This word is used for a traditional instrument, used to make calculations of altitude and traditionally employed by sailors to navigate, which has a piece shaped like a quarter of a circle. A quadrant shower is a shower that fits snugly into a bathroom corner and displays a curved front, making a quadrant shape on the floor. But perhaps quadrant is used most often today to name a particular quarter of a city.

Examples of quadrant in a Sentence

Draw two intersecting lines that divide the page into four quadrants. The town is located in the northwest quadrant of the state.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The site is located in the northwest quadrant of an approximately 42-acre vacant property in the Baker neighborhood. Kyle Newman, Chicago Tribune, 18 Mar. 2025 The other quadrant in Denver is out of the East Region, with Big Ten Tournament runner-up Wisconsin getting a No. 3 seed and No. 14 seed Montana in the first round. Matt Schubert, The Denver Post, 16 Mar. 2025 The region is located within Mare Crisium, a 300-mile-wide basin in the northeast quadrant of the moon's near side, that is believed to have been created by early volcanic eruptions and flooded with basaltic lava more than 3 billion years ago. Eric Lagatta, USA TODAY, 5 Mar. 2025 Fresno State’s ranking means Boise State’s victory only qualifies as a Quad 4 win — the lowest quadrant available. Shaun Goodwin, Idaho Statesman, 2 Mar. 2025 See All Example Sentences for quadrant

Word History

Etymology

Middle English, from Latin quadrant-, quadrans fourth part; akin to Latin quattuor four — more at four

First Known Use

15th century, in the meaning defined at sense 1a

Time Traveler
The first known use of quadrant was in the 15th century

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Cite this Entry

“Quadrant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quadrant. Accessed 5 Apr. 2025.

Kids Definition

quadrant

noun
quad·​rant ˈkwäd-rənt How to pronounce quadrant (audio)
1
: an arc of 90° : one quarter of a circle
2
: any of the four quarters into which something is divided by two real or imaginary lines that intersect each other at right angles

Medical Definition

quadrant

noun
quad·​rant ˈkwäd-rənt How to pronounce quadrant (audio)
1
: an arc of 90° that is one quarter of a circle
2
: any of the four more or less equivalent segments into which an anatomic structure may be divided by vertical and horizontal partitioning through its midpoint
pain in the lower right quadrant of the abdomen

More from Merriam-Webster on quadrant

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