kingdom

noun

One of the primary taxonomic categories into which natural objects are commonlyclassified, i.e. the largest, highest of the categories used in theclassification of organisms. Traditionally two kingdoms were recognized, thePlantae and the Animalia. There are currently five kindoms used: Plantae,Animalia, Fungi, Protoctista [(single-celled eukaryotic organisms) (Protista)(protozooans, some types of algae, etc.)], Prokaryota (Monera) (Bacteria).