释义 |
WordReference Random House Learner's Dictionary of American English © 2024sphere /sfɪr/USA pronunciation n. [countable]- Mathematicsa solid, round figure or body whose surface is at all points the same distance from the center.
- Astronomya planet or star;
heavenly body. - the environment or surroundings within which a person or thing exists or operates:Does the UN's sphere of influence (= the area in which it is the dominant power) encompass the whole world?
- a field of something specified or mentioned:a sphere of knowledge.
WordReference Random House Unabridged Dictionary of American English © 2024sphere (sfēr),USA pronunciation n., v., sphered, spher•ing. n. - Mathematics[Geom.]
- a solid geometric figure generated by the revolution of a semicircle about its diameter;
a round body whose surface is at all points equidistant from the center. Equation:x2 + y2 + z2 = r2. - the surface of such a figure;
a spherical surface.
- any rounded body approximately of this form;
a globular mass, shell, etc. - Astronomy
- a planet or star;
heavenly body. - See celestial sphere.
- any of the transparent, concentric, spherical shells, or layers, in which, according to ancient belief, the planets, stars, and other heavenly bodies were set.
- the place or environment within which a person or thing exists;
a field of activity or operation:to be out of one's professional sphere. - a particular social world, stratum of society, or walk of life:His social sphere is small.
- a field of something specified:a sphere of knowledge.
v.t. - to enclose in or as if in a sphere.
- to form into a sphere.
- to place among the heavenly spheres.
- Late Latin spēra, variant of sphēra
- Old French spere
- Greek sphaîra ball; replacing Middle English spere
- Late Latin sphēra, Latin sphaera globe
- 1250–1300
sphere′less, adj. sphere′like′, adj. - 4.See corresponding entry in Unabridged orbit, area, province, compass, realm, domain.
- 5.See corresponding entry in Unabridged class, rank.
-sphere, - a combining form of sphere (planisphere);
having a special use in the names of the layers of gases and the like surrounding the earth and other celestial bodies (ionosphere).
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