Definitions:

1. a basic group of natural objects noun
   • All trees belong to the plant kingdom.
2. a domain in which something is dominant noun
   • This island is my kingdom.
3. a monarchy with a king or queen as head of state noun
   • The Kingdom of England persisted for centuries before becoming the Kingdom of Great Britain, then finally the United Kingdom.
4. the domain ruled by a king or queen noun
   • The monarchy protected their kingdom with vast armies.
5. the second highest taxonomic group into which organisms are grouped, being beneath domain and above phylum noun
   • The kingdom Animalia contains all animal life.

Synonyms:

• land
• realm