Meaning & use
sphere
A perfectly round three-dimensional shape in which every point on the surface is the same distance from the center.
See it in a sentence
A basketball is roughly a sphere, though it flattens slightly under pressure.
Astronomers model planets as spheres to estimate their volume and mass.
A note on using this word
Sphere is often used figuratively for an area of influence, as in 'political sphere,' beyond its strict geometric sense.
Words with a similar meaning
globeorb
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. noun
A particular area of activity, interest, or influence.
Renewable energy has become an important sphere of research for young engineers.
Make it your own
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