# geometry

/dʒiˈɑmətɹi/ (US) · /dʒiˈɒmətɹˌi/ (UK)

Source: https://englishreference.com/word/geometry
Updated: 2026-06-20

## Senses

### 1. mathematical study

noun · CEFR B1

the area of math that deals with points, lines, angles, and shapes.

For teachers: the branch of mathematics that investigates the properties, measurement, and relationships of points, lines, angles, surfaces, and solids.

- In our geometry class today, we learned how to calculate the area of a circle.
- Euclidean geometry remains the foundation of most secondary school mathematics curricula, providing a rigorous introduction to logical proofs and spatial reasoning.

Usage: Uncountable when referring to the academic subject.

### 2. physical shape or arrangement

noun · CEFR B2 · Technical

the specific shape or arrangement of the parts of something.

For teachers: the physical shape, configuration, or spatial arrangement of the parts of an object or system.

- The geometry of the new bike frame makes it much easier to ride uphill.
- The unique geometry of the aircraft's wings allows it to maintain stability even when flying at extremely high speeds through turbulent air.

Usage: Often used in singular form to describe a specific design.

### 3. a specific mathematical system

noun · CEFR C1 · Academic · Technical

a particular type of math system used to describe space, such as one that works on a curved surface.

For teachers: a specific mathematical system or set of axioms that defines spatial relationships, often distinguished from Euclidean principles.

- Scientists use a different geometry to explain how gravity works in deep space.
- The discovery of non-Euclidean geometries in the nineteenth century fundamentally altered our understanding of the physical universe and the nature of mathematical truth.

Usage: Countable in this sense.

## Examples

- We are learning how to calculate the area of a circle in geometry.
- Architects must have a deep understanding of geometry to design buildings that are both stable and beautiful.
- The artist used complex non-Euclidean geometry to create a sense of distorted perspective that challenged the viewer's perception of the gallery space.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.