An abstract sphere of infinite radius which serves as the imaginary backdrop for celestial objects, and of which the visible sky is one hemisphere.
the figure of the universe as an imaginary sphere whose center is the Earth
The curved surface of a frustum of a sphere, the portion of surface of a sphere delimited by parallel planes.
A series of planes having mutually parallel intersections.
A given area distinguished on the basis of a particular characteristic, use, restriction, etc.
A band or stripe extending around a body.
A circuit; a circumference.
Any given region or area of the world.
Every of the three parts of an ice rink, divided by two blue lines.
A belt or girdle.
A defensive scheme where defenders guard a particular area of the court or field, as opposed to a particular opposing player.
A semicircular area in front of each goal.
The strike zone.
A high-performance phase or period.
A band or area of growth encircling anything.
That collection of a domain's DNS resource records, the domain and its subdomains, that are not delegated to another authority.
A frustum of a sphere.
To divide into or assign to sections or areas.
To enter a daydream state temporarily, for instance as a result of boredom, fatigue, or intoxication; to doze off.
To define the property use classification of (an area).