From WordNet (r) 2.0 (August 2003) [wn]:
kingdom
n 1: a domain in which something is dominant; "the untroubled
kingdom of reason"; "a land of make-believe"; "the rise
of the realm of cotton in the south" [syn: land,
realm]
2: a country with a king as head of state
3: the domain ruled by a king or queen [syn: realm]
4: a monarchy with a king or queen as head of state
5: one of seven biological categories: Monera or Protoctista or
Plantae or Fungi or Animalia
6: a basic group of natural objects
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Kingdom \King"dom\, n. [AS. cyningd[=o]m. See 2d King, and
-dom.]
1. The rank, quality, state, or attributes of a king; royal
authority; sovereign power; rule; dominion; monarchy.
[1913 Webster]
Thy kingdom is an everlasting kingdom. --Ps. cxiv.
13.
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When Jehoram was risen up to the kingdom of his
father, he strengthened himself. --2 Chron.
xxi. 4.
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2. 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.
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Unto the kingdom of perpetual night. --Shak.
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You're welcome,
Most learned reverend sir, into our kingdom. --Shak.
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3. An extensive scientific division distinguished by leading
or ruling characteristics; a principal division; a
department; as, the mineral kingdom. In modern biology,
the division of life into five kingdoms is widely used for
classification. "The animal and vegetable kingdoms."
--Locke.
[1913 Webster +PJC]
Animal kingdom. See under Animal.
Kingdom of God.
(a) The universe.
(b) That spiritual realm of which God is the acknowledged
sovereign.
(c) The authority or dominion of God.
Mineral kingdom. See under Mineral.
United Kingdom. See under United.
Vegetable kingdom. See under Vegetable.
Syn: Realm; empire; dominion; monarchy; sovereignty; domain.
[1913 Webster]