A realm having a king and/or queen as its actual or nominal sovereign.
User Defined Definitions
"a domain in which something is dominant"
"a country with a king as head of state"
"the domain ruled by a king or queen"
"a monarchy with a king or queen as head of state"
"the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia"