sphere
(sfĭr)
[Middle English spere, from Old French espere, from Latin sphaera, from Greek sphaira.]
noun
- Mathematics A three-dimensional surface, all points of which are equidistant from a fixed point.
- A spherical object or figure.
- A celestial body, such as a planet or star.
- The sky, appearing as a hemisphere to an observer: the sphere of the heavens.
- Any of a series of concentric, transparent, revolving globes that together were once thought to contain the moon, sun, planets, and stars.
- The extent of a person's knowledge, interests, or social position.
- An area of power, control, or influence; domain. See synonyms at field
transitive verb: sphered, spher·ing, spheres.
- To form into a sphere.
- To put in or within a sphere.
- To surround or encompass.
derivatives
- sphe·rići·ty
- noun
