realm

noun

1. 1

   An abstract sphere of influence, real or imagined.

2. 2

   The domain of a certain abstraction.

3. 3

   A scope of operation in networking or security.

4. 4

   A territory or state, as ruled by a specific power, especially by a king.

5. 5

   An otherworldly dimension or domain — magical, ethereal, or otherwise — usually ruled or created by a mystical character.

6. 6

   A taxonomic rank in the phylogeny of viruses, higher than kingdoms.