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
An abstract sphere of influence, real or imagined.
A taxonomic rank in the phylogeny of viruses, higher than kingdoms.
A scope of operation in networking or security.
An otherworldly dimension or domain — magical, ethereal, or otherwise — usually ruled or created by a mystical character.
A territory or state, as ruled by a specific power, especially by a king.
The domain of a certain abstraction.