realm

Noun

• a knowledge domain that you are interested in or are communicating about
  • it was a limited realm of discourse
    
  • here we enter the region of opinion
    
  • the realm of the occult
    

• the domain ruled by a king or queen

• a domain in which something is dominant
  • the untroubled kingdom of reason
    
  • a land of make-believe
    
  • the rise of the realm of cotton in the south
    

Related words

• Synonyms: 
  region , kingdom , land