# sphere

/ˈsfɪɹ/ (US) · /sfˈiə/ (UK)

Source: https://englishreference.com/word/sphere
Updated: 2026-05-02

## Senses

### 1. a round object

noun · CEFR B2

a solid object that is perfectly round, like a ball.

For teachers: a three-dimensional object or surface where all points are equidistant from a central point.

- The artist placed a large marble sphere in the center of the garden.
- The physicist calculated the volume of the sphere to determine how much liquid the container could hold under pressure.

### 2. area of activity

noun · CEFR C1 · Academic

a particular area of interest, work, or influence.

For teachers: a metaphorical domain or field of activity, interest, or social standing.

- The two countries agreed to respect each other's sphere of influence.
- In the political sphere, the senator was known for her ability to build consensus among opposing factions.

Usage: Often used in the phrase 'sphere of influence' or 'public/private sphere'.

### 3. the heavens

noun · CEFR C2 · Archaic · Literary

the sky or space, imagined as a giant globe surrounding the Earth.

For teachers: the celestial shell or heavens, historically conceived as a series of concentric globes carrying the planets.

- Ancient astronomers believed the stars were fixed to a crystal sphere.
- The poet wrote of the music of the spheres, imagining the harmonious sounds created by the movement of the planets.

Teaching tip: This sense is largely restricted to historical or literary contexts discussing pre-modern science.

### 4. to make round

verb · CEFR C2 · Literary

to make something into the shape of a ball.

For teachers: to form into a round shape or to place within a spherical environment.

- The water droplets began to sphere as they fell through the air.
- The sculptor worked the clay until he managed to sphere the mass into a perfectly balanced form.

Usage: This verb use is rare in modern English; 'shape into a sphere' is more common.

## Examples

- The earth is not a perfect sphere.
- The diplomat has spent her entire career working in the political sphere.
- While the artist was famous within the domestic sphere, her work struggled to gain recognition in the international arena where different aesthetic values dominated.

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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.