kingdom

noun

1. 1

   a basic group of natural objects

2. 2

   the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia

3. 3

   a monarchy with a king or queen as head of state

4. 4

   the domain ruled by a king or queen

5. 5

   a country with a king as head of state

6. 6

   a domain in which something is dominant

   the untroubled kingdom of reason

   a land of make-believe