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1. in the classification of living organisms, the highest of the categories; the most widely used classification system lists five kingdoms: monera, protista, fungi, Planta (the plants, and Animalia (the animals).
2. traditionally, one of three major categories into which natural objects may be classified, consisting of the animal, plant, and mineral kingdoms.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
The highest taxonomic category into which living forms are classified, comprising Monera (bacteria and blue-green algae), Protista (protozoa and eukaryotic algae), Fungi (fungi), Plantae (plants), and Animalia (animals).
[A.S. cyningdōm, fr. cyning, king, + -dom, state, condition]
Farlex Partner Medical Dictionary © Farlex 2012
1. In the Linnean taxonomic system, the highest taxonomic category into which organisms are grouped, based on fundamental similarities and common ancestry. One widely used taxonomic system designates five or six such groups: animals, plants, fungi, protists, and prokaryotes (often divided into bacteria and archaea). Other systems divide organisms into domains (eukaryotes, bacteria, and archaea) that replace or rank above kingdoms.
2. One of the three main divisions (animal, vegetable, and mineral) into which natural organisms and objects have traditionally been classified.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
kingdomthe highest taxonomic grouping (TAXON) in some CLASSIFICATIONS. In older classifications, five kingdoms are recognised: PLANTAE, ANIMALIA, FUNGI, PROTISTA and MONERA. In more recent classifications, based on genetic structures and sequences, many other groupings of equivalent status to kingdom (though in some BACTERIA referred to as PHYLA) are recognized.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005