any spherically shaped artifact
"The archaeologist carefully brushed away the dirt to reveal an ancient bronze sphere lying in the excavation pit."
the geographical area in which one nation is very influential
"The United States has long maintained a dominant sphere of influence across much of Central America."
a solid figure bounded by a spherical surface (including the space it encloses)
"The planet is not just its outer shell but also includes the sphere of air and water that surrounds it, making the entire world a massive sphere."
a three-dimensional closed surface such that every point on the surface is equidistant from the center
"The architect designed a dome using a sphere, ensuring every point on its curved surface was exactly the same distance from the central axis."
the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
"To an observer standing on Earth, all stars seem to lie on a single luminous sphere surrounding us."
A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter .
"The architect calculated that the dome would form a perfect sphere if rotated around its central axis."
In plain English: A sphere is a perfectly round three-dimensional shape that looks exactly like a ball with no corners or edges.
"The basketball bounced back up after hitting the floor and completed its sphere shape perfectly in mid-air."
Usage: Use "sphere" as a noun to describe either a round three-dimensional shape like a ball or an abstract area of activity and influence. Avoid using it as a verb unless you specifically mean to enclose something within such a boundary.
To place in a sphere, or among the spheres; to ensphere.
"The architect decided to enclose the garden within a glass sphere to protect it from the harsh winter winds."
In plain English: To sphere something means to make it into a round ball shape.
"You must stay within your sphere and not interfere with their personal lives."
The word "sphere" comes from the Latin sphēra, which originally meant "ball" or "globe." It was borrowed into English via Old French and Middle English from Ancient Greek, where it also referred to a ball or celestial sphere.