kingdom, land, realm -- (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")
kingdom -- (a country with a king as head of state)
kingdom, realm -- (the domain ruled by a king or queen)
kingdom -- (a monarchy with a king or queen as head of state)
kingdom -- (the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia)