ge·​om·​e·​try | \ jē-ˈä-mə-trē How to pronounce geometry (audio) \
plural geometries

Definition of geometry

1a : a branch of mathematics that deals with the measurement, properties, and relationships of points, lines, angles, surfaces, and solids broadly : the study of properties of given elements that remain invariant under specified transformations
b : a particular type or system of geometry Euclidean geometry
b : surface shape (as of a mechanical part or a crystal)
3 : an arrangement of objects or parts that suggests geometric figures the geometry of neoclassical architecture

Keep scrolling for more

Examples of geometry in a Sentence

the geometry of Sydney's famed opera house is suggestive of some modernistic sailing ship
Recent Examples on the Web Arundhati Velamur, 33, who is getting her Ph.D. in education, spent the semester leading a course about the teaching of geometry. New York Times, "‘They’re Trying to Bully Us’: N.Y.U. Graduate Students Are Back on Strike," 30 Apr. 2021 The playful cut offered a dose of organic geometry to her flouncy roseate gown, making for an unexpected and well-balanced moment. Calin Van Paris, Vogue, "Halle Berry Debuts a Transformative Haircut on the Oscars Red Carpet," 25 Apr. 2021 The gallery describes it as an alchemy of geometry, what does that mean to you? Nadja Sayej, Forbes, "Jac Lahav On Alchemy, Ancient Ruins And Abstraction," 21 Apr. 2021 Aside for some more friendly native plantings, the geometry of Johnson’s park would be largely retained. Mark Lamster, Dallas News, "Why Dallas should be grateful for a Thanks-Giving Square makeover," 18 Mar. 2021 In other words, the geometry of neurons in the part of the brain that receives signals from the retina mirrors the layout of the retina itself. John Timmer, Ars Technica, "Two very different approaches to restoring vision," 6 Dec. 2020 This led him to a crucial result about the geometry of black holes, known as Hawking’s area theorem. James Gleick, The New York Review of Books, "Eclipsed by Fame," 13 Apr. 2021 Local differential geometry, global topology and analysis are different aspects of geometry. Quanta Magazine, "Isadore Singer Transcended Mathematical Boundaries," 4 Mar. 2021 It’s a medieval curriculum of arithmetic, geometry, astronomy and music. New York Times, "24 Hours With Andra Day: Afrobeat and the Nixon Tapes," 2 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'geometry.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of geometry

14th century, in the meaning defined at sense 1a

History and Etymology for geometry

Middle English geometrie, from Anglo-French, from Latin geometria, from Greek geōmetria, from geōmetrein to measure the earth, from geō- ge- + metron measure — more at measure

Keep scrolling for more

Learn More about geometry

Time Traveler for geometry

Time Traveler

The first known use of geometry was in the 14th century

See more words from the same century

Statistics for geometry

Last Updated

11 May 2021

Cite this Entry

“Geometry.” Dictionary, Merriam-Webster, Accessed 17 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for geometry



English Language Learners Definition of geometry

: a branch of mathematics that deals with points, lines, angles, surfaces, and solids


ge·​om·​e·​try | \ jē-ˈä-mə-trē How to pronounce geometry (audio) \

Kids Definition of geometry

: a branch of mathematics that deals with points, lines, angles, surfaces, and solids

Comments on geometry

What made you want to look up geometry? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Words Used by Nabokov Quiz

  • image1676440788
  • Choose the best definition or synonym for the word in bold: "There are some eructations that sound like cheers—at least, mine did." Lolita
True or False

Test your knowledge - and maybe learn something along the way.

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!