kingdom

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A political or territorial unit ruled by a sovereign.
2. n. The eternal spiritual sovereignty of God or Christ.
3. n. The realm of this sovereignty.
4. n. A realm or sphere in which one thing is dominant: the kingdom of the imagination.
5. n. One of the three main divisions (animal, vegetable, and mineral) into which natural organisms and objects are classified.
6. n. In the Linnaean taxonomic system, the highest taxonomic classification into which organisms are grouped, based on fundamental similarities and common ancestry. The Linnaean system designates five such classifications: animals, plants, fungi, prokaryotes, and protoctists. See Table at taxonomy.

Century Dictionary and Cyclopedia

1. n. The power or authority of a king; regal dominion; supreme rule.
2. n. The state of being a king; kinghood; kingship.
3. n. The territory or country subject to a king; the dominion of a king or monarch (see king, 1); in general, a domain; country.
4. n. Anything conceived as constituting a realm or sphere of independent action or control: as, the kingdom of thought.
5. n. In the New Testament, with the definite article, usually in fuller phrase the kingdom of God, or the kingdom of heaven, the spiritual reign of God as supreme king, and over subjects loyally accepting it: generally conceived as founded by the Messiah, and therefore a Messianic kingdom. The term is used with different shades of meaning, but always with this fundamental idea of God's reign as recognized and loyally accepted. Sometimes this reign is spoken of as recognized in the heart and life of the individual, sometimes as supreme in the community, sometimes prophetically as in its perfection embracing the whole body of the redeemed. (See, for a collection of these definitions, Dr. James S. Candlish's “The Kingdom of God,” Appendix, note 2, p. 392.)
6. n. In natural history, one of the three great divisions in which natural objects are ranked in classification—namely, the animal, vegetable, and mineral kingdoms

Wiktionary

1. n. A nation having as supreme ruler a king and/or queen.
2. n. biology, taxonomy A rank in the classification of organisms, below domain and above phylum; a taxon at that rank (e.g. the plant kingdom, the animal kingdom)

GNU Webster's 1913

1. n. The rank, quality, state, or attributes of a king; royal authority; sovereign power; rule; dominion; monarchy.
2. n. The territory or country subject to a king or queen; the dominion of a monarch; the sphere in which one is king or has control.
3. n. An extensive scientific division distinguished by leading or ruling characteristics; a principal division; a department. In modern biology, the division of life into five kingdoms is widely used for classification.

WordNet 3.0

1. n. a monarchy with a king or queen as head of state
2. n. a domain in which something is dominant
3. n. the highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
4. n. the domain ruled by a king or queen
5. n. a basic group of natural objects
6. n. a country with a king as head of state