- 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.
Origin of sphere
OTHER WORDS FROM spheresphereless, adjectivespherelike, adjectivesubsphere, nounun·spher·ing, adjective
Other definitions for sphere (2 of 2)
How to use sphere in a sentence
The digital dating sphere can prove tricky, and bruising, for the trans user.
This may be precisely the point: that fiction at its best is a sphere of suspended belief as much as suspended disbelief.
In almost every sphere of life, the trend is to trade in ownership for access.
At that point, a sphere lit up, resembling the landing of the UFO in E.T., and the overheard lights descended on the stage.I'm Not Country or Pop. I'm Just Pure Garth Brooks.|David Masciotra|September 10, 2014|DAILY BEAST
Why tolerate toxicity in a powerful sphere of modern life that has the potential to—and does—benefit so many?Zelda Williams Is the Latest to Leave Twitter Because of Ugly Attacks|Tauriq Moosa|August 14, 2014|DAILY BEAST
If ever the fusion of two human beings into one has been accomplished on this sphere it was surely in their union.The Awakening and Selected Short Stories|Kate Chopin
The belated moon stole up from its lair, hovered above the sky-line, a gaudy orange sphere in the haze of smoke.Raw Gold|Bertrand W. Sinclair
But in 1811 he was recalled to Paris to receive orders before starting on a new sphere of duty.Napoleon's Marshals|R. P. Dunn-Pattison
Hence in the house, the sphere of the Genius is no longer the hearth but the marriage-bed (lectus genialis).The Religion of Ancient Rome|Cyril Bailey
Second, geology, which takes account of all those actions which in process of time have been developed in our own sphere.Outlines of the Earth's History|Nathaniel Southgate Shaler
British Dictionary definitions for sphere (1 of 2)
- a three-dimensional closed surface such that every point on the surface is equidistant from a given point, the centre
- the solid figure bounded by this surface or the space enclosed by it. Equation: (x–a)² + (y–b)² + (z–c)² = r ², where r is the radius and (a, b, c) are the coordinates of the centre; surface area: 4π r ²; volume: 4π r ³/3