geometry

From Old French géométrie, from Latin geometria, from Ancient Greek γεωμετρία (geōmetría, “geometry, land-survey”), from γεωμέτρης (geōmétrēs, “land measurer”), from γῆ (gê, “earth, land, country”) + -μετρία (-metría, “measurement”), from μέτρον (métron, “a measure”).

Doublet of gematria.

• (US) IPA^(key): /d͡ʒiˈɑm.ə.tɹi/

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• (UK) IPA^(key): /d͡ʒiːˈɒm.ɪ.tɹi/, /ˈd͡ʒɒm.ɪ.tɹi/

geometry (countable and uncountable, plural geometries)

1. (mathematics, uncountable) The branch of mathematics dealing with spatial relationships.
   • 1925, David Eugene Smith, Marcia Latham (translators), René Descartes, The Geometry of Rene Descartes, [1637, La Géométrie], 2007, Cosimo Classics, page 2,

     ANY problem in geometry can easily be reduced to such terms that a knowledge of the lengths of certain straight lines is sufficient for its construction.

2. (mathematics, often qualified in combination, countable) A mathematical system that deals with spatial relationships and that is built on a particular set of axioms; a subbranch of geometry which deals with such a system or systems.
   • 1975 [Addison-Wesley], Eugene F. Krause, Taxicab Geometry, 1986, Dover, page 64,

     Entire new geometries are also suggested by real-world cities.

   • 2004, Judith Cederberg, A Course in Modern Geometries, Springer, page 1:

     Finite geometries were developed in the late nineteenth century, in part to demonstrate and test the axiomatic properties of completeness, consistency, and independence.

   • 2006, Mark Wagner, The Geometries of Visual Space, Lawrence Erlbaum Associates, page ix,

     Previous theorists have often tried to test whether visual space is best described by a small set of traditional geometries, such as the Euclidean geometry most of us studied in High School or the hyperbolic and spherical geometries introduced by 19^th-century mathematicians.

3. (countable) The observed or specified spatial attributes of an object, etc.
   • 2003, Matt Welsh, Running Linux, page 74:

     Also, certain SCSI controllers need to be told where to find drive geometry in order for Linux to recognize the layout of your drive.

   • 2018 March 14, Roger Penrose, “'Mind over matter': Stephen Hawking – obituary”, in The Guardian:

     He was extremely highly regarded, in view of his many greatly impressive, sometimes revolutionary, contributions to the understanding of the physics and the geometry of the universe.

4. (algebraic geometry, countable) A mathematical object comprising representations of a space and of its spatial relationships.

• mathematics

• gematria
• geometer
• geometric
• geometrical

• topology

• geometry on Wikipedia.Wikipedia
• “geometry”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
• geometry at OneLook Dictionary Search
• Geometry on Encyclopedia of Mathematics
• Geometry on Wolfram MathWorld
• Geometry on Wikibooks