- The definition of geometry is a branch of math that focuses on the measurement and relationship of lines, angles, surfaces, solids and points.
An example of geometry is the calculation of a triangle's angles.
- the branch of mathematics that deals with points, lines, planes, and figures, and examines their properties, measurement, and mutual relations in space
- a book about geometry
- a specific system of geometry
Origin of geometryMiddle English geometrie ; from Old French ; from Classical Latin geometria ; from Classical Greek geōmetria ; from geōmetrein, to measure the earth ; from gē, earth + metria, measurement ; from metrein, to measure: for Indo-European base, see meter
- a. The mathematics of the properties, measurement, and relationships of points, lines, angles, surfaces, and solids.b. A system of geometry: Euclidean geometry.c. A geometry restricted to a class of problems or objects: solid geometry.d. A book on geometry.
- a. Configuration; arrangement.b. A surface shape.
- A physical arrangement suggesting geometric forms or lines.
Origin of geometryMiddle English geometrie, from Old French, from Latin geōmetria, from Greek geōmetriā, from geōmetrein, to measure land : geō-, geo- + metron, measure; see mē-2 in Indo-European roots.
- ge·om′e·tri′cian , ge·om′e·ter
(countable and uncountable, plural geometries)
- (mathematics, uncountable) the branch of mathematics dealing with spatial relationships
- (mathematics, countable) a type of geometry with particular properties
- spherical geometry
- (countable) the spatial attributes of an object, etc.
From Old French géométrie, from Latin geometria, from Ancient Greek γεωμετρία (geometría, “geometry, land-survey”), from γεωμετρέω (geometréo, “to practice or to profess geometry, to measure, to survey land”), back-formation from γεωμέτρης (geométrēs, “land measurer”), from γῆ (gē, “earth, land, country”) + μετρέω (metréō, “to measure, to count”) or -μετρία (-metria, “measurement”), from μέτρον (metron, “a measure”).