the five kingdoms definition
5. kingdom-the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia. animal kingdom, Animalia, kingdom Animalia-taxonomic kingdom comprising all living or extinct animals.ther systems divide organisms into domains (eukaryotes, bacteria, and archaea) that replace or rank above kingdoms. 5. One of the three main divisions (animal, vegetable, and mineral) into which natural organisms and objects have traditionally been classified.