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# sphere

«sphere» in Mova's school dictionary: **A round solid shape like a ball, where every point on the…** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

noun (a sphere, spheres)

### meaning for a pupil

1) A round solid shape like a ball, where every point on the surface is the same distance from the centre. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#m1)

2) An area of activity, interest or power: the sphere of science. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#m2)

3) (science) A layer around the Earth: atmosphere, hemisphere. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#m3)

4) In old writings, the spheres are the heavens, the great rings in the sky that carry the stars and planets. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#m4)

### sense in the lessons

In maths, a sphere is a 3-D shape with one curved face, no edges and no vertices; balls, bubbles and planets are nearly spheres. In geography, hemispheres are halves of the Earth. Phrases: sphere of influence, half a sphere (hemisphere).

### examples

- A football is a sphere. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#x1)
- A sphere has one curved face and no edges. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#x2)
- The Earth is nearly a sphere. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#x3)
- A bubble is a sphere. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#x4)
- Half a sphere is called a hemisphere. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#x5)
- Music is her sphere of interest. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#x6)
- Through the spheres echoed the words: [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/#x7)

### note

Countable. Adjective: spherical. Spelling: sph-ere. Maths: a sphere is 3-D; its flat 2-D cousin is a circle. Volume = 4/3 × π × r³ (later maths).

### Trees and pragmatics

[Every meaning and example of «sphere» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/sphere/), each sentence with its dependency tree and frames.