kingdom
noun
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a basic group of natural objects“All trees belong to the plant kingdom.”
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the second highest taxonomic group into which organisms are grouped, being beneath domain and above phylum“The kingdom Animalia contains all animal life.”
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a monarchy with a king or queen as head of state“The Kingdom of England persisted for centuries before becoming the Kingdom of Great Britain, then finally the United Kingdom.”
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the domain ruled by a king or queen“The monarchy protected their kingdom with vast armies.”realm
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a domain in which something is dominant“This island is my kingdom.”land