n a domain in which something is dominant
the untroubled kingdom of reason
n a country with a king as head of state
n the domain ruled by a king or queen
n a monarchy with a king or queen as head of state
n the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
n prokaryotic bacteria and blue-green algae and various primitive pathogens; because of lack of consensus on how to divide the organisms into phyla informal names are used for the major divisions